2 * FreeRDP: A Remote Desktop Protocol client.
3 * Redirected Parallel Port Device Service
5 * Copyright 2010 O.S. Systems Software Ltda.
6 * Copyright 2010 Eduardo Fiss Beloni <beloni@ossystems.com.br>
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
30 #include <sys/ioctl.h>
32 #include <linux/ppdev.h>
33 #include <linux/parport.h>
36 #include <freerdp/types.h>
37 #include <freerdp/constants.h>
38 #include <freerdp/utils/list.h>
39 #include <freerdp/utils/thread.h>
40 #include <freerdp/utils/memory.h>
41 #include <freerdp/utils/stream.h>
42 #include <freerdp/utils/svc_plugin.h>
44 #include "rdpdr_constants.h"
45 #include "rdpdr_types.h"
47 struct _PARALLEL_DEVICE
56 freerdp_thread* thread;
58 typedef struct _PARALLEL_DEVICE PARALLEL_DEVICE;
60 static void parallel_process_irp_create(PARALLEL_DEVICE* parallel, IRP* irp)
66 stream_seek(irp->input, 28);
67 /* DesiredAccess(4) AllocationSize(8), FileAttributes(4) */
68 /* SharedAccess(4) CreateDisposition(4), CreateOptions(4) */
69 stream_read_uint32(irp->input, PathLength);
71 uniconv = freerdp_uniconv_new();
72 path = freerdp_uniconv_in(uniconv, stream_get_tail(irp->input), PathLength);
73 freerdp_uniconv_free(uniconv);
75 parallel->id = irp->devman->id_sequence++;
76 parallel->file = open(parallel->path, O_RDWR);
77 if (parallel->file < 0)
79 irp->IoStatus = STATUS_ACCESS_DENIED;
82 DEBUG_WARN("failed to create %s: %s", parallel->path, strerror(errno));
86 /* all read and write operations should be non-blocking */
87 if (fcntl(parallel->file, F_SETFL, O_NONBLOCK) == -1)
88 DEBUG_WARN("%s fcntl %s", path, strerror(errno));
90 DEBUG_SVC("%s(%d) created", parallel->path, parallel->file);
93 stream_write_uint32(irp->output, parallel->id);
94 stream_write_uint8(irp->output, 0);
101 static void parallel_process_irp_close(PARALLEL_DEVICE* parallel, IRP* irp)
103 if (close(parallel->file) < 0)
104 DEBUG_SVC("failed to close %s(%d)", parallel->path, parallel->id);
106 DEBUG_SVC("%s(%d) closed", parallel->path, parallel->id);
108 stream_write_zero(irp->output, 5); /* Padding(5) */
113 static void parallel_process_irp_read(PARALLEL_DEVICE* parallel, IRP* irp)
118 uint8* buffer = NULL;
120 stream_read_uint32(irp->input, Length);
121 stream_read_uint64(irp->input, Offset);
123 buffer = (uint8*) xmalloc(Length);
125 status = read(parallel->file, irp->output->p, Length);
129 irp->IoStatus = STATUS_UNSUCCESSFUL;
134 DEBUG_WARN("read %s(%d) failed", parallel->path, parallel->id);
138 DEBUG_SVC("read %llu-%llu from %d", Offset, Offset + Length, parallel->id);
141 stream_write_uint32(irp->output, Length);
144 stream_check_size(irp->output, Length);
145 stream_write(irp->output, buffer, Length);
152 static void parallel_process_irp_write(PARALLEL_DEVICE* parallel, IRP* irp)
159 stream_read_uint32(irp->input, Length);
160 stream_read_uint64(irp->input, Offset);
161 stream_seek(irp->input, 20); /* Padding */
163 DEBUG_SVC("Length %u Offset %llu", Length, Offset);
168 status = write(parallel->file, stream_get_tail(irp->input), len);
172 irp->IoStatus = STATUS_UNSUCCESSFUL;
175 DEBUG_WARN("write %s(%d) failed.", parallel->path, parallel->id);
179 stream_seek(irp->input, status);
183 stream_write_uint32(irp->output, Length);
184 stream_write_uint8(irp->output, 0); /* Padding */
189 static void parallel_process_irp_device_control(PARALLEL_DEVICE* parallel, IRP* irp)
192 stream_write_uint32(irp->output, 0); /* OutputBufferLength */
196 static void parallel_process_irp(PARALLEL_DEVICE* parallel, IRP* irp)
198 DEBUG_SVC("MajorFunction %u", irp->MajorFunction);
200 switch (irp->MajorFunction)
203 parallel_process_irp_create(parallel, irp);
207 parallel_process_irp_close(parallel, irp);
211 parallel_process_irp_read(parallel, irp);
215 parallel_process_irp_write(parallel, irp);
218 case IRP_MJ_DEVICE_CONTROL:
219 parallel_process_irp_device_control(parallel, irp);
223 DEBUG_WARN("MajorFunction 0x%X not supported", irp->MajorFunction);
224 irp->IoStatus = STATUS_NOT_SUPPORTED;
230 static void parallel_process_irp_list(PARALLEL_DEVICE* parallel)
236 if (freerdp_thread_is_stopped(parallel->thread))
239 freerdp_thread_lock(parallel->thread);
240 irp = (IRP*) list_dequeue(parallel->irp_list);
241 freerdp_thread_unlock(parallel->thread);
246 parallel_process_irp(parallel, irp);
250 static void* parallel_thread_func(void* arg)
252 PARALLEL_DEVICE* parallel = (PARALLEL_DEVICE*) arg;
256 freerdp_thread_wait(parallel->thread);
258 if (freerdp_thread_is_stopped(parallel->thread))
261 freerdp_thread_reset(parallel->thread);
262 parallel_process_irp_list(parallel);
265 freerdp_thread_quit(parallel->thread);
270 static void parallel_irp_request(DEVICE* device, IRP* irp)
272 PARALLEL_DEVICE* parallel = (PARALLEL_DEVICE*) device;
274 freerdp_thread_lock(parallel->thread);
275 list_enqueue(parallel->irp_list, irp);
276 freerdp_thread_unlock(parallel->thread);
278 freerdp_thread_signal(parallel->thread);
281 static void parallel_free(DEVICE* device)
284 PARALLEL_DEVICE* parallel = (PARALLEL_DEVICE*) device;
286 DEBUG_SVC("freeing device");
288 freerdp_thread_stop(parallel->thread);
289 freerdp_thread_free(parallel->thread);
291 while ((irp = (IRP*) list_dequeue(parallel->irp_list)) != NULL)
294 list_free(parallel->irp_list);
299 int DeviceServiceEntry(PDEVICE_SERVICE_ENTRY_POINTS pEntryPoints)
304 PARALLEL_DEVICE* parallel;
306 name = (char*) pEntryPoints->plugin_data->data[1];
307 path = (char*) pEntryPoints->plugin_data->data[2];
309 if (name[0] && path[0])
311 parallel = xnew(PARALLEL_DEVICE);
313 parallel->device.type = RDPDR_DTYP_PARALLEL;
314 parallel->device.name = name;
315 parallel->device.IRPRequest = parallel_irp_request;
316 parallel->device.Free = parallel_free;
318 length = strlen(name);
319 parallel->device.data = stream_new(length + 1);
321 for (i = 0; i <= length; i++)
322 stream_write_uint8(parallel->device.data, name[i] < 0 ? '_' : name[i]);
324 parallel->path = path;
326 parallel->irp_list = list_new();
327 parallel->thread = freerdp_thread_new();
329 pEntryPoints->RegisterDevice(pEntryPoints->devman, (DEVICE*) parallel);
331 freerdp_thread_start(parallel->thread, parallel_thread_func, parallel);