serial.c 7.24 KB
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/*
 * Server-side serial port communications management
 *
 * Copyright (C) 1998 Alexandre Julliard
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 * Copyright (C) 2000,2001 Mike McCormack
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 *
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 */

#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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#endif
#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#endif
#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_POLL_H
#include <poll.h>
#endif
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#include "ntstatus.h"
#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "file.h"
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#include "handle.h"
#include "thread.h"
#include "request.h"

static void serial_dump( struct object *obj, int verbose );
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static struct fd *serial_get_fd( struct object *obj );
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static void serial_destroy(struct object *obj);

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static enum server_fd_type serial_get_fd_type( struct fd *fd );
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static void serial_flush( struct fd *fd, struct event **event );
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static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
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struct serial
{
    struct object       obj;
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    struct fd          *fd;
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    /* timeout values */
    unsigned int        readinterval;
    unsigned int        readconst;
    unsigned int        readmult;
    unsigned int        writeconst;
    unsigned int        writemult;

    unsigned int        eventmask;

    struct termios      original;

    /* FIXME: add dcb, comm status, handler module, sharing */
};

static const struct object_ops serial_ops =
{
    sizeof(struct serial),        /* size */
    serial_dump,                  /* dump */
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    no_get_type,                  /* get_type */
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    add_queue,                    /* add_queue */
    remove_queue,                 /* remove_queue */
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    default_fd_signaled,          /* signaled */
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    no_satisfied,                 /* satisfied */
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    no_signal,                    /* signal */
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    serial_get_fd,                /* get_fd */
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    default_fd_map_access,        /* map_access */
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    default_get_sd,               /* get_sd */
    default_set_sd,               /* set_sd */
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    no_lookup_name,               /* lookup_name */
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    no_open_file,                 /* open_file */
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    fd_close_handle,              /* close_handle */
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    serial_destroy                /* destroy */
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};

static const struct fd_ops serial_fd_ops =
{
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    default_fd_get_poll_events,   /* get_poll_events */
    default_poll_event,           /* poll_event */
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    serial_flush,                 /* flush */
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    serial_get_fd_type,           /* get_file_info */
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    default_fd_ioctl,             /* ioctl */
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    serial_queue_async,           /* queue_async */
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    default_fd_reselect_async,    /* reselect_async */
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    default_fd_cancel_async       /* cancel_async */
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};

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/* check if the given fd is a serial port */
int is_serial_fd( struct fd *fd )
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{
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    struct termios tios;

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    return !tcgetattr( get_unix_fd(fd), &tios );
}
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/* create a serial object for a given fd */
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struct object *create_serial( struct fd *fd )
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{
    struct serial *serial;
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    if (!(serial = alloc_object( &serial_ops ))) return NULL;

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    serial->readinterval = 0;
    serial->readmult     = 0;
    serial->readconst    = 0;
    serial->writemult    = 0;
    serial->writeconst   = 0;
    serial->eventmask    = 0;
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    serial->fd = (struct fd *)grab_object( fd );
    set_fd_user( fd, &serial_fd_ops, &serial->obj );
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    return &serial->obj;
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}

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static struct fd *serial_get_fd( struct object *obj )
{
    struct serial *serial = (struct serial *)obj;
    return (struct fd *)grab_object( serial->fd );
}

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static void serial_destroy( struct object *obj)
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{
    struct serial *serial = (struct serial *)obj;
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    release_object( serial->fd );
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}

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static void serial_dump( struct object *obj, int verbose )
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{
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    struct serial *serial = (struct serial *)obj;
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    assert( obj->ops == &serial_ops );
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    fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
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}

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static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
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{
    return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
}

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static enum server_fd_type serial_get_fd_type( struct fd *fd )
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{
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    return FD_TYPE_SERIAL;
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}

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static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
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{
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    struct serial *serial = get_fd_user( fd );
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    timeout_t timeout = 0;
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    struct async *async;
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    assert(serial->obj.ops == &serial_ops);
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    switch (type)
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    {
    case ASYNC_TYPE_READ:
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        timeout = serial->readconst + (timeout_t)serial->readmult*count;
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        break;
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    case ASYNC_TYPE_WRITE:
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        timeout = serial->writeconst + (timeout_t)serial->writemult*count;
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        break;
    }

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    if ((async = fd_queue_async( fd, data, type, count )))
    {
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        if (timeout) async_set_timeout( async, timeout * -10000, STATUS_TIMEOUT );
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        release_object( async );
        set_error( STATUS_PENDING );
    }
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}
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static void serial_flush( struct fd *fd, struct event **event )
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{
    /* MSDN says: If hFile is a handle to a communications device,
     * the function only flushes the transmit buffer.
     */
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    if (tcflush( get_unix_fd(fd), TCOFLUSH ) == -1) file_set_error();
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}

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DECL_HANDLER(get_serial_info)
{
    struct serial *serial;

    if ((serial = get_serial_obj( current->process, req->handle, 0 )))
    {
        /* timeouts */
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        reply->readinterval = serial->readinterval;
        reply->readconst    = serial->readconst;
        reply->readmult     = serial->readmult;
        reply->writeconst   = serial->writeconst;
        reply->writemult    = serial->writemult;
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        /* event mask */
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        reply->eventmask    = serial->eventmask;
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        release_object( serial );
    }
}

DECL_HANDLER(set_serial_info)
{
    struct serial *serial;

    if ((serial = get_serial_obj( current->process, req->handle, 0 )))
    {
        /* timeouts */
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        if (req->flags & SERIALINFO_SET_TIMEOUTS)
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        {
            serial->readinterval = req->readinterval;
            serial->readconst    = req->readconst;
            serial->readmult     = req->readmult;
            serial->writeconst   = req->writeconst;
            serial->writemult    = req->writemult;
        }

        /* event mask */
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        if (req->flags & SERIALINFO_SET_MASK)
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        {
            serial->eventmask = req->eventmask;
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            if (!serial->eventmask)
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            {
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                fd_async_wake_up( serial->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
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            }
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        }

        release_object( serial );
    }
}