337 lines
9.9 KiB
C
337 lines
9.9 KiB
C
/*
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* Server-side serial port communications management
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*
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* Copyright (C) 1998 Alexandre Julliard
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* Copyright (C) 2000,2001 Mike McCormack
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* 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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*/
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#include "config.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#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
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#include <poll.h>
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#endif
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "winioctl.h"
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#include "ddk/ntddser.h"
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#include "file.h"
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#include "handle.h"
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#include "thread.h"
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#include "request.h"
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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_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
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static void serial_queue_async( struct fd *fd, struct async *async, int type, int count );
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static void serial_reselect_async( struct fd *fd, struct async_queue *queue );
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struct serial
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{
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struct object obj;
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struct fd *fd;
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struct timeout_user *read_timer;
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SERIAL_TIMEOUTS timeouts;
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unsigned int eventmask;
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unsigned int generation; /* event mask change counter */
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unsigned int pending_write : 1;
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unsigned int pending_wait : 1;
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struct termios original;
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/* FIXME: add dcb, comm status, handler module, sharing */
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};
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static const struct object_ops serial_ops =
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{
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sizeof(struct serial), /* size */
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&file_type, /* type */
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serial_dump, /* dump */
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add_queue, /* add_queue */
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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_map_access, /* map_access */
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default_get_sd, /* get_sd */
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default_set_sd, /* set_sd */
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no_get_full_name, /* get_full_name */
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no_lookup_name, /* lookup_name */
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no_link_name, /* link_name */
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NULL, /* unlink_name */
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no_open_file, /* open_file */
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no_kernel_obj_list, /* get_kernel_obj_list */
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no_close_handle, /* close_handle */
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serial_destroy /* destroy */
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};
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static const struct fd_ops serial_fd_ops =
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{
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default_fd_get_poll_events, /* get_poll_events */
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default_poll_event, /* poll_event */
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serial_get_fd_type, /* get_fd_type */
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no_fd_read, /* read */
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no_fd_write, /* write */
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no_fd_flush, /* flush */
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default_fd_get_file_info, /* get_file_info */
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no_fd_get_volume_info, /* get_volume_info */
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serial_ioctl, /* ioctl */
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default_fd_cancel_async, /* cancel_async */
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serial_queue_async, /* queue_async */
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serial_reselect_async /* reselect_async */
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};
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/* check if the given fd is a serial port */
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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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}
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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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{
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struct serial *serial;
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if (!(serial = alloc_object( &serial_ops ))) return NULL;
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serial->read_timer = NULL;
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serial->eventmask = 0;
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serial->generation = 0;
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serial->pending_write = 0;
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serial->pending_wait = 0;
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memset( &serial->timeouts, 0, sizeof(serial->timeouts) );
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serial->fd = (struct fd *)grab_object( fd );
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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 )
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{
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struct serial *serial = (struct serial *)obj;
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return (struct fd *)grab_object( serial->fd );
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}
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static void serial_destroy( struct object *obj)
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{
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struct serial *serial = (struct serial *)obj;
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if (serial->read_timer) remove_timeout_user( serial->read_timer );
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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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{
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return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
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}
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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_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
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{
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struct serial *serial = get_fd_user( fd );
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switch (code)
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{
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case IOCTL_SERIAL_GET_TIMEOUTS:
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if (get_reply_max_size() < sizeof(serial->timeouts))
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{
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set_error( STATUS_BUFFER_TOO_SMALL );
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return;
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}
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set_reply_data( &serial->timeouts, sizeof(serial->timeouts ));
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return;
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case IOCTL_SERIAL_SET_TIMEOUTS:
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if (get_req_data_size() < sizeof(serial->timeouts))
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{
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set_error( STATUS_BUFFER_TOO_SMALL );
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return;
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}
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memcpy( &serial->timeouts, get_req_data(), sizeof(serial->timeouts) );
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return;
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case IOCTL_SERIAL_GET_WAIT_MASK:
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if (get_reply_max_size() < sizeof(serial->eventmask))
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{
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set_error( STATUS_BUFFER_TOO_SMALL );
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return;
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}
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set_reply_data( &serial->eventmask, sizeof(serial->eventmask) );
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return;
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case IOCTL_SERIAL_SET_WAIT_MASK:
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if (get_req_data_size() < sizeof(serial->eventmask))
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{
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set_error( STATUS_BUFFER_TOO_SMALL );
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return;
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}
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serial->eventmask = *(unsigned int *)get_req_data();
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serial->generation++;
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fd_async_wake_up( serial->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
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return;
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default:
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set_error( STATUS_NOT_SUPPORTED );
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}
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}
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static void serial_queue_async( struct fd *fd, struct async *async, 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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assert(serial->obj.ops == &serial_ops);
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switch (type)
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{
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case ASYNC_TYPE_READ:
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timeout = serial->timeouts.ReadTotalTimeoutConstant +
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(timeout_t)serial->timeouts.ReadTotalTimeoutMultiplier * count;
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break;
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case ASYNC_TYPE_WRITE:
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timeout = serial->timeouts.WriteTotalTimeoutConstant +
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(timeout_t)serial->timeouts.WriteTotalTimeoutMultiplier * count;
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break;
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}
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fd_queue_async( fd, async, type );
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if (timeout) async_set_timeout( async, timeout * -10000, STATUS_TIMEOUT );
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set_error( STATUS_PENDING );
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}
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static void serial_read_timeout( void *arg )
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{
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struct serial *serial = arg;
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serial->read_timer = NULL;
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fd_async_wake_up( serial->fd, ASYNC_TYPE_READ, STATUS_TIMEOUT );
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}
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static void serial_reselect_async( struct fd *fd, struct async_queue *queue )
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{
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struct serial *serial = get_fd_user( fd );
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if (serial->read_timer)
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{
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if (!(default_fd_get_poll_events( fd ) & POLLIN))
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{
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remove_timeout_user( serial->read_timer );
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serial->read_timer = NULL;
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}
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}
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else if (serial->timeouts.ReadIntervalTimeout && (default_fd_get_poll_events( fd ) & POLLIN))
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{
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serial->read_timer = add_timeout_user( (timeout_t)serial->timeouts.ReadIntervalTimeout * -10000,
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serial_read_timeout, serial );
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}
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default_fd_reselect_async( fd, queue );
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}
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DECL_HANDLER(get_serial_info)
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{
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struct serial *serial;
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if ((serial = get_serial_obj( current->process, req->handle, 0 )))
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{
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if (req->flags & SERIALINFO_PENDING_WAIT)
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{
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if (serial->pending_wait)
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{
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release_object( serial );
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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serial->pending_wait = 1;
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}
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/* event mask */
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reply->eventmask = serial->eventmask;
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reply->cookie = serial->generation;
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/* pending write */
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reply->pending_write = serial->pending_write;
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if (req->flags & SERIALINFO_PENDING_WRITE)
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serial->pending_write = 0;
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release_object( serial );
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}
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}
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DECL_HANDLER(set_serial_info)
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{
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struct serial *serial;
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if ((serial = get_serial_obj( current->process, req->handle, 0 )))
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{
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if (req->flags & SERIALINFO_PENDING_WAIT)
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{
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if (!serial->pending_wait)
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{
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release_object( serial );
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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serial->pending_wait = 0;
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}
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/* pending write */
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if (req->flags & SERIALINFO_PENDING_WRITE)
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serial->pending_write = 1;
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release_object( serial );
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}
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}
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