/*
* 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2014 Gary Mills
*/
/*
* interface( label )
* provide alternate definitions for the I/O functions through global
* interfaces.
*/
#include "mt.h"
#include "uucp.h"
#include <unistd.h>
#ifdef TLI
#include <tiuser.h>
#endif /* TLI */
static void sethup(int);
static int restline(void);
static int usetup(int, int *, int *);
static int uteardown(int, int, int);
static ssize_t (*Read)() = read,
(*Write)() = write;
static int (*Ioctl)(int, int, ...) = ioctl,
(*Setup)() = usetup;
#ifdef TLI
static void tfaillog(int fd, const char *s);
static void show_tlook(int);
static ssize_t tread(int, char *, unsigned);
static ssize_t twrite(int, char *, unsigned);
static int tioctl(int, int, ...);
static int tsetup(int, int *, int *); /* TLI setup without streams module */
static int tssetup(int, int *, int *); /* TLI setup with streams module */
static int tteardown(int, int, int); /* 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 {
const char *IN_label; /* interface name */
ssize_t (*IN_read)(); /* read function */
ssize_t (*IN_write)(); /* write function */
int (*IN_ioctl)(int, int, ...);
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 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 */
{ 0, 0, 0, 0, 0, 0 }
};
static int
interface(const char *label)
{
int i;
for (i = 0; Interface[i].IN_label; ++i) {
if (strcmp(Interface[i].IN_label, label) == 0) {
Read = Interface[i].IN_read;
Write = Interface[i].IN_write;
Ioctl = Interface[i].IN_ioctl;
Setup = Interface[i].IN_setup;
DEBUG(5, "set interface %s\n", label);
return (0);
}
}
return (FAIL);
}
/*
* usetup - vanilla unix setup routine
*/
static int
usetup(int role, int *fdreadp, int *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(int role, int fdread, int fdwrite)
{
char *ttyn;
if (role == SLAVE) {
(void) restline();
sethup(0);
}
if (fdread != -1) {
ttyn = ttyname(fdread);
if (ttyn != NULL)
/* can fail, but who cares? */
(void) chmod(ttyn, Dev_mode);
(void) close(fdread);
(void) close(fdwrite);
}
return (SUCCESS);
}
#ifdef TLI
/*
* tread - tli read routine
*/
static ssize_t
tread(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(int fd, char *buf, unsigned nbytes)
{
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 ((ssize_t)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 ((ssize_t)(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
tioctl(int fd, int request, ...)
{
return (SUCCESS);
}
/*
* tsetup - tli setup routine
* note blatant assumption that *fdreadp == *fdwritep == 0
*/
static int
tsetup(int role, int *fdreadp, int *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(int role, int fdread, int 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(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.
*/
static void
tfaillog(int fd, const char *s)
{
char fmt[ BUFSIZ ];
if (0 < t_errno && t_errno < t_nerr) {
(void) snprintf(fmt, sizeof (fmt), "%s: %%s\n", s);
DEBUG(5, fmt, t_errlist[t_errno]);
logent(s, t_errlist[t_errno]);
if (t_errno == TSYSERR) {
(void) strcpy(fmt, "tlicall: system error: %s\n");
DEBUG(5, fmt, strerror(errno));
} else if (t_errno == TLOOK) {
show_tlook(fd);
}
} else {
(void) snprintf(fmt, sizeof (fmt),
"unknown tli error %d", t_errno);
logent(s, fmt);
(void) snprintf(fmt, sizeof (fmt),
"%s: unknown tli error %d", s, t_errno);
DEBUG(5, fmt, 0);
(void) snprintf(fmt, sizeof (fmt), "%s: %%s\n", s);
DEBUG(5, fmt, strerror(errno));
}
}
static void
show_tlook(int fd)
{
int reason;
const char *msg;
/*
* Find out the current state of the interface.
*/
errno = t_errno = 0;
switch (reason = t_getstate(fd)) {
case T_UNBND: msg = (const char *)"T_UNBIND"; break;
case T_IDLE: msg = (const char *)"T_IDLE"; break;
case T_OUTCON: msg = (const char *)"T_OUTCON"; break;
case T_INCON: msg = (const char *)"T_INCON"; break;
case T_DATAXFER: msg = (const char *)"T_DATAXFER"; break;
case T_OUTREL: msg = (const char *)"T_OUTREL"; break;
case T_INREL: msg = (const char *)"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 = (const char *)""; break;
case 0: msg = (const char *)"NO ERROR"; break;
case T_LISTEN: msg = (const char *)"T_LISTEN"; break;
case T_CONNECT: msg = (const char *)"T_CONNECT"; break;
case T_DATA: msg = (const char *)"T_DATA"; break;
case T_EXDATA: msg = (const char *)"T_EXDATA"; break;
case T_DISCONNECT: msg = (const char *)"T_DISCONNECT"; break;
case T_ORDREL: msg = (const char *)"T_ORDREL"; break;
case T_UDERR: msg = (const char *)"T_UDERR"; break;
default: msg = (const char *)"UNKNOWN ERROR"; break;
}
DEBUG(4, " reason is %s\n", msg);
if (reason == T_DISCONNECT) {
struct t_discon *dropped;
if (((dropped =
/* LINTED pointer cast */
(struct t_discon *)t_alloc(fd, T_DIS, T_ALL)) == 0) ||
(t_rcvdis(fd, dropped) == -1)) {
if (dropped)
(void) t_free((char *)dropped, T_DIS);
return;
}
DEBUG(5, "disconnect reason #%d\n", dropped->reason);
(void) t_free((char *)dropped, T_DIS);
}
}
#endif /* TLIS */
#endif /* TLI */