468 lines
10 KiB
C
468 lines
10 KiB
C
/* Copyright (c) 1984 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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */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 "$Revision: 1.9 $"
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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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#ifdef TLI
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#include <sys/tiuser.h>
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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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dkteardown();
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#endif /* DATAKIT */
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static int usetup(int, int *, int *);
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static int uteardown(int, int, int);
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int (*Read)(int, void *, unsigned) = read,
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(*Write)(int, const void *, unsigned) = write,
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(*Ioctl)(int, int, ...) = ioctl,
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(*Setup)(int, int *, int *) = usetup,
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(*Teardown)(int, int, int) = uteardown;
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#ifdef TLI
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static int tread(), twrite(), /* TLI i/o */
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tioctl(), /* TLI i/o control */
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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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char *IN_label; /* interface name */
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int (*IN_read)(int, void *, unsigned);
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int (*IN_write)(int, const void *, unsigned);
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int (*IN_ioctl)(int, int, ...);
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int (*IN_setup)(int, int *, int *); /* called before 1st i/o op */
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int (*IN_teardown)(int, int, int); /* called after last i/o op */
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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 sgi
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{ "ACU", read, write, ioctl, usetup, uteardown },
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{ "TCP", read, write, ioctl, usetup, uteardown },
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#endif /* sgi */
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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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{ 0, 0, 0, 0, 0, 0 }
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};
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int
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interface(char *label)
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{
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register int i;
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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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return( 0 );
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}
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}
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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
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int
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usetup(int role, int *fdreadp, int *fdwritep)
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{
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if ( role == SLAVE )
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{
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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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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
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int
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uteardown(int role, int fdread, int fdwrite)
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{
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int ret;
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char *ttyn;
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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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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
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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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(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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return(FAIL);
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}
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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
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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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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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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
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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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return(t_rcv(fd, buf, nbytes, &rcvflags));
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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
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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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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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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 && t_getstate(fd) != T_DATAXFER )
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return(FAIL);
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if ( info.tsdu <= 0 || nbytes <= info.tsdu )
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return(t_snd(fd, buf, nbytes, NULL));
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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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return( ( ret >= 0 ? (i + ret) : ret ) );
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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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return( ( ret >= 0 ? (i + ret) : ret ) );
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i += nbytes;
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}
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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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static
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tioctl(fd, request, arg)
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int fd, request;
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{
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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
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int
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tsetup( role, fdreadp, fdwritep )
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int *fdreadp, *fdwritep;
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{
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int initstate = 0;
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struct stat statbuf;
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extern int errno, t_errno;
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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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return(FAIL);
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}
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}
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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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static
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int
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tteardown( role, fdread, fdwrite )
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{
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(void)t_unbind(fdread);
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(void)t_close(fdread);
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return(SUCCESS);
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}
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#ifdef TLIS
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#include <sys/stropts.h>
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#include <sys/conf.h>
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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
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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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char strmod[FMNAMESZ], onstream[FMNAMESZ];
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int optional;
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extern int getpop(), getpush();
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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", 0);
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return(SUCCESS);
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}
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/* check for streams modules to pop */
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while ( getpop(strmod, sizeof(strmod), &optional) ) {
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DEBUG(5,
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( optional ? "tssetup: optionally POPing %s\n"
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: "tssetup: POPing %s\n" ),
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strmod);
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if ( ioctl(*fdreadp, I_LOOK, onstream) == -1 ) {
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DEBUG(5, "tssetup: I_LOOK on fd %d failed", *fdreadp);
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return(FAIL);
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}
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if ( strcmp(strmod, onstream) != SAME ) {
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if ( optional )
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continue;
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DEBUG(5, "tssetup: I_POP: %s not there\n", strmod);
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return(FAIL);
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}
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if ( ioctl(*fdreadp, I_POP, 0) == -1 ) {
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DEBUG(5, "tssetup: I_POP on fd %d failed", *fdreadp);
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return(FAIL);
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}
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}
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/* check for streams modules to push */
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while ( getpush(strmod, sizeof(strmod)) ) {
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DEBUG(5, "tssetup: PUSHing %s\n", strmod);
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if ( ioctl(*fdreadp, I_PUSH, strmod) == -1 ) {
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DEBUG(5, "tssetup: I_PUSH on fd %d failed", *fdreadp);
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return(FAIL);
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}
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}
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DEBUG(4, "tssetup: MASTER mode: leaving ok\n", "");
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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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tfaillog(fd, s)
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int fd;
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char *s;
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{
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extern char *t_errlist[];
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extern int errno, t_errno, t_nerr;
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char fmt[ BUFSIZ ];
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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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DEBUG(5, "", perror("tlicall: system error"));
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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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DEBUG(5, "", perror(s));
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}
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}
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static
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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 char *msg;
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/*
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* Find out the current state of the interface.
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*/
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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 = "T_UNBIND"; break;
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case T_IDLE: msg = "T_IDLE"; break;
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case T_OUTCON: msg = "T_OUTCON"; break;
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case T_INCON: msg = "T_INCON"; break;
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case T_DATAXFER: msg = "T_DATAXFER"; break;
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case T_OUTREL: msg = "T_OUTREL"; break;
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case T_INREL: msg = "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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return;
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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 = ""; break;
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case 0: msg = "NO ERROR"; break;
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case T_LISTEN: msg = "T_LISTEN"; break;
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case T_CONNECT: msg = "T_CONNECT"; break;
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case T_DATA: msg = "T_DATA"; break;
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case T_EXDATA: msg = "T_EXDATA"; break;
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case T_DISCONNECT: msg = "T_DISCONNECT"; break;
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case T_ORDREL: msg = "T_ORDREL"; break;
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case T_ERROR: msg = "T_ERROR"; break;
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case T_UDERR: msg = "T_UDERR"; break;
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default: msg = "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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return;
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}
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DEBUG(5, "disconnect reason #%d\n", dropped->reason);
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t_free(dropped);
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}
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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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