502 lines
11 KiB
C
Executable File
502 lines
11 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)interface.c 1.9 93/08/30 SMI" /* SVr4.0 1.2 */
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/* interface( label )
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provide alternate definitions for the I/O functions through global
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interfaces.
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*/
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#include "uucp.h"
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#include <rpc/trace.h>
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#ifdef TLI
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#include <tiuser.h>
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char *t_alloc();
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int t_bind(), t_close(), t_connect(), t_free(), t_look(), t_open(), t_rcvdis();
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int t_getinfo(), t_getstate(), t_look(), t_rcv(), t_snd(), t_sync(), t_unbind();
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#endif /* TLI */
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#ifdef DATAKIT
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#include "dk.h"
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static int dksetup();
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static int dkteardown();
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#endif /* DATAKIT */
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EXTERN void sethup();
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EXTERN int restline();
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extern int read(), write();
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static int usetup(), uteardown();
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GLOBAL int (*Read)() = read,
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(*Write)() = write,
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#if defined(__STDC__)
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(*Ioctl)(int,int,...) = ioctl,
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#else
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(*Ioctl)() = ioctl,
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#endif
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(*Setup)() = usetup,
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(*Teardown)() = uteardown;
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#ifdef TLI
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#if defined(__STDC__)
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EXTERN void tfaillog(int fd, const char *s);
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#else
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EXTERN void tfaillog();
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#endif
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EXTERN void show_tlook();
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static int tread(), twrite(), /* TLI i/o */
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#ifdef __STDC__
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tioctl(int, int, ...),
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#else
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tioctl(), /* TLI i/o control */
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#endif
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tsetup(), /* TLI setup without streams module */
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tssetup(), /* TLI setup with streams module */
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tteardown(); /* TLI teardown, works with either setup
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*/
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#endif /* TLI */
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/* The IN_label in Interface[] imply different caller routines:
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e.g. tlicall().
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If so, the names here and the names in callers.c must match.
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*/
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static
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struct Interface {
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const char *IN_label; /* interface name */
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int (*IN_read)(); /* read function */
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int (*IN_write)(); /* write function */
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#ifdef __STDC__
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int (*IN_ioctl)(int,int,...);
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#else
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int (*IN_ioctl)(); /* ioctl function */
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#endif
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int (*IN_setup)(); /* setup function, called before first
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i/o operation */
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int (*IN_teardown)(); /* teardown function, called after last
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i/o operation */
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} Interface[] = {
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/* vanilla UNIX */
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{ "UNIX", read, write, ioctl, usetup, uteardown },
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#ifdef SYTEK
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/* Sytek network */
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{ "Sytek", read, write, ioctl, usetup, uteardown },
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#endif /* Sytek network */
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#ifdef DIAL801
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/* 801 auto dialers */
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{ "801", read, write, ioctl, usetup, uteardown },
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#endif /* DIAL801 */
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#ifdef DIAL801
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/* 212 auto dialers */
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{ "212", read, write, ioctl, usetup, uteardown },
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#endif /* DIAL801 */
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#ifdef TLI
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/* AT&T Transport Interface Library WITHOUT streams */
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{ "TLI", tread, twrite, tioctl, tsetup, tteardown },
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#ifdef TLIS
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/* AT&T Transport Interface Library WITH streams */
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{ "TLIS", read, write, tioctl, tssetup, uteardown },
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#endif /* TLIS */
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#endif /* TLI */
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#ifdef DATAKIT
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{ "DK", read, write, ioctl, dksetup, dkteardown },
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#endif /* DATAKIT */
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#ifdef UNET /* this should work for 4.2BSD and 3com */
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{ "TCP", read, write, ioctl, usetup, uteardown },
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#endif
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#ifdef UNET
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{ "Unetserver", read, write, ioctl, usetup, uteardown },
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#endif
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{ 0, 0, 0, 0, 0, 0 }
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};
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GLOBAL int
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interface(label)
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char *label;
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{
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register int i;
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trace1(TR_interface, 0);
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for (i = 0; Interface[i].IN_label; ++i) {
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if (!strcmp(Interface[i].IN_label, label)) {
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Read = Interface[i].IN_read;
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Write = Interface[i].IN_write;
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Ioctl = Interface[i].IN_ioctl;
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Setup = Interface[i].IN_setup;
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Teardown = Interface[i].IN_teardown;
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DEBUG(5, "set interface %s\n", label);
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trace1(TR_interface, 1);
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return (0);
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}
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}
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trace1(TR_interface, 1);
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return (FAIL);
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}
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/*
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* usetup - vanilla unix setup routine
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*/
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static int
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usetup(role, fdreadp, fdwritep)
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int *fdreadp, *fdwritep;
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{
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trace1(TR_usetup, 0);
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if (role == SLAVE) {
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*fdreadp = 0;
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*fdwritep = 1;
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/* 2 has been re-opened to RMTDEBUG in main() */
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}
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trace1(TR_usetup, 1);
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return (SUCCESS);
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}
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/*
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* uteardown - vanilla unix teardown routine
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*/
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static int
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uteardown(role, fdread, fdwrite)
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{
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int ret;
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char *ttyn;
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trace1(TR_uteardown, 0);
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if (role == SLAVE) {
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ret = restline();
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DEBUG(4, "ret restline - %d\n", ret);
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sethup(0);
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}
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if (fdread != -1) {
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ttyn = ttyname(fdread);
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if (ttyn != NULL)
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chmod(ttyn, Dev_mode); /* can fail, but who cares? */
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(void) close(fdread);
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(void) close(fdwrite);
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}
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trace1(TR_uteardown, 1);
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return (SUCCESS);
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}
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#ifdef DATAKIT
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/*
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* dksetup - DATAKIT setup routine
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*
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* Put line in block mode.
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*/
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static int
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dksetup (role, fdreadp, fdwritep)
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int role;
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int * fdreadp;
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int * fdwritep;
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{
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static short dkrmode[3] = { DKR_BLOCK | DKR_TIME, 0, 0 };
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int ret;
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trace2(TR_dksetup, 0, role);
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(void) usetup(role, fdreadp, fdwritep);
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if ((ret = (*Ioctl)(*fdreadp, DIOCRMODE, dkrmode)) < 0) {
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DEBUG(4, "dksetup: failed to set block mode. ret=%d,\n", ret);
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DEBUG(4, "read fd=%d, ", *fdreadp);
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DEBUG(4, "errno=%d\n", errno);
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trace1(TR_dksetup, 1);
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return (FAIL);
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}
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trace1(TR_dksetup, 1);
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return (SUCCESS);
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}
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/*
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* dkteardown - DATAKIT teardown routine
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*/
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static int
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dkteardown(role, fdread, fdwrite)
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int role, fdread, fdwrite;
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{
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char *ttyn;
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trace4(TR_dkteardown, 0, role, fdread, fdwrite);
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if (role == MASTER) {
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ttyn = ttyname(fdread);
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if (ttyn != NULL)
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chmod(ttyn, Dev_mode); /* can fail, but who cares? */
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}
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/* must flush fd's for datakit */
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/* else close can hang */
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if (ioctl(fdread, DIOCFLUSH, NULL) != 0)
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DEBUG(4, "dkteardown: DIOCFLUSH of input fd %d failed", fdread);
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if (ioctl(fdwrite, DIOCFLUSH, NULL) != 0)
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DEBUG(4, "dkteardown: DIOCFLUSH of output fd %d failed", fdwrite);
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(void) close(fdread);
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(void) close(fdwrite);
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trace1(TR_dkteardown, 1);
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return (SUCCESS);
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}
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#endif /* DATAKIT */
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#ifdef TLI
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/*
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* tread - tli read routine
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*/
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static int
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tread(fd, buf, nbytes)
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int fd;
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char *buf;
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unsigned nbytes;
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{
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int rcvflags;
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int dummy;
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trace2(TR_tread, 0, fd);
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dummy = t_rcv(fd, buf, nbytes, &rcvflags);
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trace1(TR_tread, 1);
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return (dummy);
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}
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/*
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* twrite - tli write routine
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*/
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#define N_CHECK 100
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static int
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twrite(fd, buf, nbytes)
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int fd;
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char *buf;
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unsigned nbytes;
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{
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register int i, ret;
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static int n_writ, got_info;
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static struct t_info info;
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int dummy;
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trace3(TR_twrite, 0, fd, nbytes);
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if (got_info == 0) {
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if (t_getinfo(fd, &info) != 0) {
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tfaillog(fd, "twrite: t_getinfo\n");
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trace1(TR_twrite, 1);
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return (FAIL);
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}
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got_info = 1;
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}
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/* on every N_CHECKth call, check that are still in DATAXFER state */
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if (++n_writ == N_CHECK) {
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n_writ = 0;
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if (t_getstate(fd) != T_DATAXFER) {
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trace1(TR_twrite, 1);
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return (FAIL);
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}
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}
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if (info.tsdu <= 0 || nbytes <= info.tsdu) {
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dummy = t_snd(fd, buf, nbytes, NULL);
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trace1(TR_twrite, 1);
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return (dummy);
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}
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/* if get here, then there is a limit on transmit size */
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/* (info.tsdu > 0) and buf exceeds it */
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i = ret = 0;
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while (nbytes >= info.tsdu) {
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if ((ret = t_snd(fd, &buf[i], info.tsdu, NULL)) != info.tsdu) {
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trace1(TR_twrite, 1);
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return ((ret >= 0 ? (i + ret) : ret));
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}
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i += info.tsdu;
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nbytes -= info.tsdu;
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}
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if (nbytes != 0) {
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if ((ret = t_snd(fd, &buf[i], nbytes, NULL)) != nbytes) {
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trace1(TR_twrite, 1);
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return ((ret >= 0 ? (i + ret) : ret));
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}
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i += nbytes;
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}
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trace1(TR_twrite, 1);
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return (i);
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}
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/*
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* tioctl - stub for tli ioctl routine
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*/
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/* ARGSUSED */
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static int
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#ifdef __STDC__
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tioctl(int fd, int request, ...)
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#else
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tioctl(fd, request, arg)
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int fd, request;
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#endif
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{
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trace1(TR_tioctl, 0);
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trace1(TR_tioctl, 1);
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return (SUCCESS);
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}
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/*
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* tsetup - tli setup routine
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* note blatant assumption that *fdreadp == *fdwritep == 0
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*/
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static int
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tsetup(role, fdreadp, fdwritep)
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int *fdreadp, *fdwritep;
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{
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trace1(TR_tsetup, 0);
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if (role == SLAVE) {
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*fdreadp = 0;
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*fdwritep = 1;
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/* 2 has been re-opened to RMTDEBUG in main() */
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errno = t_errno = 0;
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if (t_sync(*fdreadp) == -1 || t_sync(*fdwritep) == -1) {
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tfaillog(*fdreadp, "tsetup: t_sync\n");
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trace1(TR_tsetup, 1);
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return (FAIL);
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}
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}
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trace1(TR_tsetup, 1);
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return (SUCCESS);
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}
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/*
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* tteardown - tli shutdown routine
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*/
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/* ARGSUSED */
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static int
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tteardown(role, fdread, fdwrite)
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{
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trace1(TR_tteardown, 0);
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(void) t_unbind(fdread);
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(void) t_close(fdread);
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trace1(TR_tteardown, 1);
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return (SUCCESS);
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}
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#ifdef TLIS
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/*
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* tssetup - tli, with streams module, setup routine
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* note blatant assumption that *fdreadp == *fdwritep
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*/
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static int
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tssetup(role, fdreadp, fdwritep)
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int role;
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int *fdreadp;
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int *fdwritep;
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{
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trace2(TR_tssetup, 0, role);
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if (role == SLAVE) {
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*fdreadp = 0;
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*fdwritep = 1;
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/* 2 has been re-opened to RMTDEBUG in main() */
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DEBUG(5, "tssetup: SLAVE mode: leaving ok\n%s", "");
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trace1(TR_tssetup, 1);
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return (SUCCESS);
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}
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DEBUG(4, "tssetup: MASTER mode: leaving ok\n%s", "");
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trace1(TR_tssetup, 1);
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return (SUCCESS);
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}
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/*
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* Report why a TLI call failed.
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*/
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GLOBAL void
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tfaillog(fd, s)
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int fd;
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const char *s;
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{
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extern char *t_errlist[];
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extern int t_nerr;
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char fmt[ BUFSIZ ];
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trace2(TR_tfaillog, 0, fd);
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if (0 < t_errno && t_errno < t_nerr) {
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sprintf(fmt, "%s: %%s\n", s);
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DEBUG(5, fmt, t_errlist[t_errno]);
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logent(s, t_errlist[t_errno]);
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if (t_errno == TSYSERR) {
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strcpy(fmt, "tlicall: system error: %s\n");
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DEBUG(5, fmt, strerror(errno));
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} else if (t_errno == TLOOK) {
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show_tlook(fd);
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}
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} else {
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sprintf(fmt, "unknown tli error %d", t_errno);
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logent(s, fmt);
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sprintf(fmt, "%s: unknown tli error %d", s, t_errno);
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DEBUG(5, fmt, 0);
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sprintf(fmt, "%s: %%s\n", s);
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DEBUG(5, fmt, strerror(errno));
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}
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trace1(TR_tfaillog, 1);
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return;
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}
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GLOBAL void
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show_tlook(fd)
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int fd;
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{
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register int reason;
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register const char *msg;
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extern int t_errno;
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/*
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* Find out the current state of the interface.
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*/
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trace2(TR_show_tlook, 0, fd);
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errno = t_errno = 0;
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switch(reason = t_getstate(fd)) {
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case T_UNBND: msg = (const char *)"T_UNBIND"; break;
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case T_IDLE: msg = (const char *)"T_IDLE"; break;
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case T_OUTCON: msg = (const char *)"T_OUTCON"; break;
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case T_INCON: msg = (const char *)"T_INCON"; break;
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case T_DATAXFER: msg = (const char *)"T_DATAXFER"; break;
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case T_OUTREL: msg = (const char *)"T_OUTREL"; break;
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case T_INREL: msg = (const char *)"T_INREL"; break;
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default: msg = NULL; break;
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}
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if (msg == NULL) {
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trace1(TR_show_tlook, 1);
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return;
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}
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DEBUG(5, "state is %s", msg);
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switch(reason = t_look(fd)) {
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case -1: msg = (const char *)""; break;
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case 0: msg = (const char *)"NO ERROR"; break;
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case T_LISTEN: msg = (const char *)"T_LISTEN"; break;
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case T_CONNECT: msg = (const char *)"T_CONNECT"; break;
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case T_DATA: msg = (const char *)"T_DATA"; break;
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case T_EXDATA: msg = (const char *)"T_EXDATA"; break;
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case T_DISCONNECT: msg = (const char *)"T_DISCONNECT"; break;
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case T_ORDREL: msg = (const char *)"T_ORDREL"; break;
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case T_ERROR: msg = (const char *)"T_ERROR"; break;
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case T_UDERR: msg = (const char *)"T_UDERR"; break;
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default: msg = (const char *)"UNKNOWN ERROR"; break;
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}
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DEBUG(4, " reason is %s\n", msg);
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if (reason == T_DISCONNECT)
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{
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struct t_discon *dropped;
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if (((dropped =
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(struct t_discon *)t_alloc(fd, T_DIS, T_ALL)) == 0)
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|| (t_rcvdis(fd, dropped) == -1)) {
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trace1(TR_show_tlook, 1);
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return;
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}
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DEBUG(5, "disconnect reason #%d\n", dropped->reason);
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t_free((char *)dropped, T_DIS);
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}
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trace1(TR_show_tlook, 1);
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return;
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}
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#endif /* TLIS */
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#endif /* TLI */
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