1 /*
2 * Server-side serial port communications management
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2000,2001 Mike McCormack
6 *
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <assert.h>
27 #include <fcntl.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <string.h>
31 #include <stdlib.h>
32 #include <sys/time.h>
33 #include <sys/types.h>
34 #include <time.h>
35 #include <unistd.h>
36 #ifdef HAVE_UTIME_H
37 #include <utime.h>
38 #endif
39 #ifdef HAVE_TERMIOS_H
40 #include <termios.h>
41 #endif
42 #ifdef HAVE_SYS_IOCTL_H
43 #include <sys/ioctl.h>
44 #endif
45 #ifdef HAVE_POLL_H
46 #include <poll.h>
47 #endif
48
49 #include "ntstatus.h"
50 #define WIN32_NO_STATUS
51 #include "windef.h"
52 #include "winternl.h"
53
54 #include "file.h"
55 #include "handle.h"
56 #include "thread.h"
57 #include "request.h"
58
59 static void serial_dump( struct object *obj, int verbose );
60 static struct fd *serial_get_fd( struct object *obj );
61 static void serial_destroy(struct object *obj);
62
63 static enum server_fd_type serial_get_fd_type( struct fd *fd );
64 static void serial_flush( struct fd *fd, struct event **event );
65 static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
66
67 struct serial
68 {
69 struct object obj;
70 struct fd *fd;
71
72 /* timeout values */
73 unsigned int readinterval;
74 unsigned int readconst;
75 unsigned int readmult;
76 unsigned int writeconst;
77 unsigned int writemult;
78
79 unsigned int eventmask;
80
81 struct termios original;
82
83 /* FIXME: add dcb, comm status, handler module, sharing */
84 };
85
86 static const struct object_ops serial_ops =
87 {
88 sizeof(struct serial), /* size */
89 serial_dump, /* dump */
90 no_get_type, /* get_type */
91 add_queue, /* add_queue */
92 remove_queue, /* remove_queue */
93 default_fd_signaled, /* signaled */
94 no_satisfied, /* satisfied */
95 no_signal, /* signal */
96 serial_get_fd, /* get_fd */
97 default_fd_map_access, /* map_access */
98 default_get_sd, /* get_sd */
99 default_set_sd, /* set_sd */
100 no_lookup_name, /* lookup_name */
101 no_open_file, /* open_file */
102 fd_close_handle, /* close_handle */
103 serial_destroy /* destroy */
104 };
105
106 static const struct fd_ops serial_fd_ops =
107 {
108 default_fd_get_poll_events, /* get_poll_events */
109 default_poll_event, /* poll_event */
110 serial_flush, /* flush */
111 serial_get_fd_type, /* get_file_info */
112 default_fd_ioctl, /* ioctl */
113 serial_queue_async, /* queue_async */
114 default_fd_reselect_async, /* reselect_async */
115 default_fd_cancel_async /* cancel_async */
116 };
117
118 /* check if the given fd is a serial port */
119 int is_serial_fd( struct fd *fd )
120 {
121 struct termios tios;
122
123 return !tcgetattr( get_unix_fd(fd), &tios );
124 }
125
126 /* create a serial object for a given fd */
127 struct object *create_serial( struct fd *fd )
128 {
129 struct serial *serial;
130
131 if (!(serial = alloc_object( &serial_ops ))) return NULL;
132
133 serial->readinterval = 0;
134 serial->readmult = 0;
135 serial->readconst = 0;
136 serial->writemult = 0;
137 serial->writeconst = 0;
138 serial->eventmask = 0;
139 serial->fd = (struct fd *)grab_object( fd );
140 set_fd_user( fd, &serial_fd_ops, &serial->obj );
141 return &serial->obj;
142 }
143
144 static struct fd *serial_get_fd( struct object *obj )
145 {
146 struct serial *serial = (struct serial *)obj;
147 return (struct fd *)grab_object( serial->fd );
148 }
149
150 static void serial_destroy( struct object *obj)
151 {
152 struct serial *serial = (struct serial *)obj;
153 release_object( serial->fd );
154 }
155
156 static void serial_dump( struct object *obj, int verbose )
157 {
158 struct serial *serial = (struct serial *)obj;
159 assert( obj->ops == &serial_ops );
160 fprintf( stderr, "Port fd=%p mask=%x\n", serial->fd, serial->eventmask );
161 }
162
163 static struct serial *get_serial_obj( struct process *process, obj_handle_t handle, unsigned int access )
164 {
165 return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
166 }
167
168 static enum server_fd_type serial_get_fd_type( struct fd *fd )
169 {
170 return FD_TYPE_SERIAL;
171 }
172
173 static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
174 {
175 struct serial *serial = get_fd_user( fd );
176 timeout_t timeout = 0;
177 struct async *async;
178
179 assert(serial->obj.ops == &serial_ops);
180
181 switch (type)
182 {
183 case ASYNC_TYPE_READ:
184 timeout = serial->readconst + (timeout_t)serial->readmult*count;
185 break;
186 case ASYNC_TYPE_WRITE:
187 timeout = serial->writeconst + (timeout_t)serial->writemult*count;
188 break;
189 }
190
191 if ((async = fd_queue_async( fd, data, type )))
192 {
193 if (timeout) async_set_timeout( async, timeout * -10000, STATUS_TIMEOUT );
194 release_object( async );
195 set_error( STATUS_PENDING );
196 }
197 }
198
199 static void serial_flush( struct fd *fd, struct event **event )
200 {
201 /* MSDN says: If hFile is a handle to a communications device,
202 * the function only flushes the transmit buffer.
203 */
204 if (tcflush( get_unix_fd(fd), TCOFLUSH ) == -1) file_set_error();
205 }
206
207 DECL_HANDLER(get_serial_info)
208 {
209 struct serial *serial;
210
211 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
212 {
213 /* timeouts */
214 reply->readinterval = serial->readinterval;
215 reply->readconst = serial->readconst;
216 reply->readmult = serial->readmult;
217 reply->writeconst = serial->writeconst;
218 reply->writemult = serial->writemult;
219
220 /* event mask */
221 reply->eventmask = serial->eventmask;
222
223 release_object( serial );
224 }
225 }
226
227 DECL_HANDLER(set_serial_info)
228 {
229 struct serial *serial;
230
231 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
232 {
233 /* timeouts */
234 if (req->flags & SERIALINFO_SET_TIMEOUTS)
235 {
236 serial->readinterval = req->readinterval;
237 serial->readconst = req->readconst;
238 serial->readmult = req->readmult;
239 serial->writeconst = req->writeconst;
240 serial->writemult = req->writemult;
241 }
242
243 /* event mask */
244 if (req->flags & SERIALINFO_SET_MASK)
245 {
246 serial->eventmask = req->eventmask;
247 if (!serial->eventmask)
248 {
249 fd_async_wake_up( serial->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
250 }
251 }
252
253 release_object( serial );
254 }
255 }
256
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