interface.c revision 09b0d01c5bc323b8ee7043100e09aded27cc12ab
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2014 Gary Mills
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* interface(label)
* provide alternate definitions for the I/O functions through global
* interfaces.
*/
#include "uucp.h"
#ifdef TLI
#include <tiuser.h>
char *t_alloc();
int t_bind(), t_close(), t_connect(), t_free(), t_look(), t_open(), t_rcvdis();
int t_getinfo(), t_getstate(), t_look(), t_rcv(), t_snd(), t_sync(), t_unbind();
#endif /* TLI */
#ifdef DATAKIT
#include "dk.h"
static int dksetup();
static int dkteardown();
#endif /* DATAKIT */
EXTERN void sethup();
EXTERN int restline();
#if defined(__STDC__)
extern int ioctl(int, int, ...);
#else
extern int ioctl();
#endif
static int usetup(), uteardown();
GLOBAL ssize_t (*Read)() = read,
(*Write)() = write;
#if defined(__STDC__)
GLOBAL int (*Ioctl)(int, int, ...) = ioctl,
#else
GLOBAL int (*Ioctl)() = ioctl,
#endif
(*Setup)() = usetup,
(*Teardown)() = uteardown;
#ifdef TLI
EXTERN void tfaillog(), show_tlook();
static ssize_t tread(), twrite(); /* TLI i/o */
#ifdef __STDC__
static int tioctl(int, int, ...),
#else
static int tioctl(), /* TLI i/o control */
#endif
tsetup(), /* TLI setup without streams module */
tssetup(), /* TLI setup with streams module */
tteardown(); /* TLI teardown, works with either setup */
#endif /* TLI */
/*
* The IN_label in Interface[] imply different caller routines:
* e.g. tlicall().
* If so, the names here and the names in callers.c must match.
*/
static
struct Interface {
char *IN_label; /* interface name */
ssize_t (*IN_read)(); /* read function */
ssize_t (*IN_write)(); /* write function */
#ifdef __STDC__
int (*IN_ioctl)(int, int, ...);
#else
int (*IN_ioctl)(); /* ioctl function */
#endif
int (*IN_setup)(); /* setup function, called before */
/* first i/o operation */
int (*IN_teardown)(); /* teardown function, called after */
/* last i/o operation */
} Interface[] = {
/* vanilla UNIX */
{ "UNIX", read, write, ioctl, usetup, uteardown },
#ifdef TCP
/* TCP over sockets or UNET */
{ "TCP", read, write, ioctl, usetup, uteardown },
#endif /* TCP */
#ifdef SYTEK
/* Sytek network */
{ "Sytek", read, write, ioctl, usetup, uteardown },
#endif /* Sytek network */
#ifdef DIAL801
/* 801 auto dialers */
{ "801", read, write, ioctl, usetup, uteardown },
#endif /* DIAL801 */
#ifdef DIAL801
/* 212 auto dialers */
{ "212", read, write, ioctl, usetup, uteardown },
#endif /* DIAL801 */
#ifdef TLI
/* AT&T Transport Interface Library WITHOUT streams */
{ "TLI", tread, twrite, tioctl, tsetup, tteardown },
#ifdef TLIS
/* AT&T Transport Interface Library WITH streams */
{ "TLIS", read, write, tioctl, tssetup, uteardown },
#endif /* TLIS */
#endif /* TLI */
#ifdef DATAKIT
{ "DK", read, write, ioctl, dksetup, dkteardown },
#endif /* DATAKIT */
#ifdef UNET
{ "Unetserver", read, write, ioctl, usetup, uteardown },
#endif
{ 0, 0, 0, 0, 0, 0 }
};
GLOBAL int
interface(label)
char *label;
{
register int i;
for (i = 0; Interface[i].IN_label; ++i) {
if (0 == strcmp(Interface[i].IN_label, label)) {
Read = Interface[i].IN_read;
Write = Interface[i].IN_write;
Ioctl = Interface[i].IN_ioctl;
Setup = Interface[i].IN_setup;
Teardown = Interface[i].IN_teardown;
DEBUG(5, "set interface %s\n", label);
return (0);
}
}
return (FAIL);
}
/*
* usetup - vanilla unix setup routine
*/
static int
usetup(role, fdreadp, fdwritep)
int *fdreadp, *fdwritep;
{
if (role == SLAVE)
{
*fdreadp = 0;
*fdwritep = 1;
/* 2 has been re-opened to RMTDEBUG in main() */
}
return (SUCCESS);
}
/*
* uteardown - vanilla unix teardown routine
*/
static int
uteardown(role, fdread, fdwrite)
{
int ret;
char *ttyn;
if (role == SLAVE) {
ret = restline();
DEBUG(4, "ret restline - %d\n", ret);
if (fdread != -1)
sethup(fdread);
}
if (fdread != -1) {
ttyn = ttyname(fdread);
if (ttyn != NULL && Dev_mode != 0)
chmod(ttyn, Dev_mode); /* can fail, but who cares? */
(void) close(fdread);
(void) close(fdwrite);
}
return (SUCCESS);
}
#ifdef DATAKIT
/*
* dksetup - DATAKIT setup routine
*
* Put line in block mode.
*/
static int
dksetup(role, fdreadp, fdwritep)
int role;
int *fdreadp;
int *fdwritep;
{
static short dkrmode[3] = { DKR_BLOCK | DKR_TIME, 0, 0 };
int ret;
(void) usetup(role, fdreadp, fdwritep);
if ((ret = (*Ioctl)(*fdreadp, DIOCRMODE, dkrmode)) < 0) {
DEBUG(4, "dksetup: failed to set block mode. ret=%d,\n", ret);
DEBUG(4, "read fd=%d, ", *fdreadp);
DEBUG(4, "errno=%d\n", errno);
return (FAIL);
}
return (SUCCESS);
}
/*
* dkteardown - DATAKIT teardown routine
*/
static int
dkteardown(role, fdread, fdwrite)
int role, fdread, fdwrite;
{
char *ttyn;
if (role == MASTER) {
ttyn = ttyname(fdread);
if (ttyn != NULL && Dev_mode != 0)
chmod(ttyn, Dev_mode); /* can fail, but who cares? */
}
/* must flush fd's for datakit */
/* else close can hang */
if (ioctl(fdread, DIOCFLUSH, NULL) != 0)
DEBUG(4, "dkteardown: DIOCFLUSH of input fd %d failed",
fdread);
if (ioctl(fdwrite, DIOCFLUSH, NULL) != 0)
DEBUG(4, "dkteardown: DIOCFLUSH of output fd %d failed",
fdwrite);
(void) close(fdread);
(void) close(fdwrite);
return (SUCCESS);
}
#endif /* DATAKIT */
#ifdef TLI
/*
* tread - tli read routine
*/
static ssize_t
tread(fd, buf, nbytes)
int fd;
char *buf;
unsigned nbytes;
{
int rcvflags;
return ((ssize_t)t_rcv(fd, buf, nbytes, &rcvflags));
}
/*
* twrite - tli write routine
*/
#define N_CHECK 100
static ssize_t
twrite(fd, buf, nbytes)
int fd;
char *buf;
unsigned nbytes;
{
register int i, ret;
static int n_writ, got_info;
static struct t_info info;
if (got_info == 0) {
if (t_getinfo(fd, &info) != 0) {
tfaillog(fd, "twrite: t_getinfo\n");
return (FAIL);
}
got_info = 1;
}
/* on every N_CHECKth call, check that are still in DATAXFER state */
if (++n_writ == N_CHECK) {
n_writ = 0;
if (t_getstate(fd) != T_DATAXFER)
return (FAIL);
}
if (info.tsdu <= 0 || nbytes <= info.tsdu)
return (t_snd(fd, buf, nbytes, NULL));
/* if get here, then there is a limit on transmit size */
/* (info.tsdu > 0) and buf exceeds it */
i = ret = 0;
while (nbytes >= info.tsdu) {
if ((ret = t_snd(fd, &buf[i], info.tsdu, NULL)) != info.tsdu)
return ((ret >= 0 ? (i + ret) : ret));
i += info.tsdu;
nbytes -= info.tsdu;
}
if (nbytes != 0) {
if ((ret = t_snd(fd, &buf[i], nbytes, NULL)) != nbytes)
return ((ssize_t)(ret >= 0 ? (i + ret) : ret));
i += nbytes;
}
return ((ssize_t)i);
}
/*
* tioctl - stub for tli ioctl routine
*/
/*ARGSUSED*/
static int
#ifdef __STDC__
tioctl(int fd, int request, ...)
#else
tioctl(fd, request, arg)
int fd, request;
#endif
{
return (SUCCESS);
}
/*
* tsetup - tli setup routine
* note blatant assumption that *fdreadp == *fdwritep == 0
*/
static int
tsetup(role, fdreadp, fdwritep)
int *fdreadp, *fdwritep;
{
if (role == SLAVE) {
*fdreadp = 0;
*fdwritep = 1;
/* 2 has been re-opened to RMTDEBUG in main() */
errno = t_errno = 0;
if (t_sync(*fdreadp) == -1 || t_sync(*fdwritep) == -1) {
tfaillog(*fdreadp, "tsetup: t_sync\n");
return (FAIL);
}
}
return (SUCCESS);
}
/*
* tteardown - tli shutdown routine
*/
/*ARGSUSED*/
static int
tteardown(role, fdread, fdwrite)
{
(void) t_unbind(fdread);
(void) t_close(fdread);
return (SUCCESS);
}
#ifdef TLIS
/*
* tssetup - tli, with streams module, setup routine
* note blatant assumption that *fdreadp == *fdwritep
*/
static int
tssetup(role, fdreadp, fdwritep)
int role;
int *fdreadp;
int *fdwritep;
{
if (role == SLAVE) {
*fdreadp = 0;
*fdwritep = 1;
/* 2 has been re-opened to RMTDEBUG in main() */
DEBUG(5, "tssetup: SLAVE mode: leaving ok\n%s", "");
return (SUCCESS);
}
DEBUG(4, "tssetup: MASTER mode: leaving ok\n%s", "");
return (SUCCESS);
}
/*
* Report why a TLI call failed.
*/
GLOBAL void
tfaillog(fd, s)
int fd;
char *s;
{
char fmt[ BUFSIZ ];
if (0 < t_errno && t_errno < t_nerr) {
sprintf(fmt, "%s: %%s\n", s);
DEBUG(5, fmt, t_errlist[t_errno]);
logent(s, t_errlist[t_errno]);
if (t_errno == TSYSERR) {
strcpy(fmt, "tlicall: system error: %s\n");
DEBUG(5, fmt, strerror(errno));
} else if (t_errno == TLOOK) {
show_tlook(fd);
}
} else {
sprintf(fmt, "unknown tli error %d", t_errno);
logent(s, fmt);
sprintf(fmt, "%s: unknown tli error %d", s, t_errno);
DEBUG(5, fmt, 0);
sprintf(fmt, "%s: %%s\n", s);
DEBUG(5, fmt, strerror(errno));
}
}
GLOBAL void
show_tlook(fd)
int fd;
{
register int reason;
register char *msg;
extern int t_errno;
/*
* Find out the current state of the interface.
*/
errno = t_errno = 0;
switch (reason = t_getstate(fd)) {
case T_UNBND: msg = "T_UNBIND"; break;
case T_IDLE: msg = "T_IDLE"; break;
case T_OUTCON: msg = "T_OUTCON"; break;
case T_INCON: msg = "T_INCON"; break;
case T_DATAXFER: msg = "T_DATAXFER"; break;
case T_OUTREL: msg = "T_OUTREL"; break;
case T_INREL: msg = "T_INREL"; break;
default: msg = NULL; break;
}
if (msg == NULL)
return;
DEBUG(5, "state is %s", msg);
switch (reason = t_look(fd)) {
case -1: msg = ""; break;
case 0: msg = "NO ERROR"; break;
case T_LISTEN: msg = "T_LISTEN"; break;
case T_CONNECT: msg = "T_CONNECT"; break;
case T_DATA: msg = "T_DATA"; break;
case T_EXDATA: msg = "T_EXDATA"; break;
case T_DISCONNECT: msg = "T_DISCONNECT"; break;
case T_ORDREL: msg = "T_ORDREL"; break;
case T_UDERR: msg = "T_UDERR"; break;
default: msg = "UNKNOWN ERROR"; break;
}
DEBUG(4, " reason is %s\n", msg);
if (reason == T_DISCONNECT)
{
struct t_discon *dropped;
if (((dropped =
(struct t_discon *)t_alloc(fd, T_DIS, T_ALL)) == 0) ||
(t_rcvdis(fd, dropped) == -1)) {
if (dropped)
t_free((char *)dropped, T_DIS);
return;
}
DEBUG(5, "disconnect reason #%d\n", dropped->reason);
t_free((char *)dropped, T_DIS);
}
}
#endif /* TLIS */
#endif /* TLI */