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Merge pull request #176 from OSSystems/parallel 

Fix and adjust parallel port redirection
This commit is contained in:
Marc-André Moreau 2011-10-24 07:45:56 -07:00
parent 1f4e4c8e93 d4b30e701a
commit 69fdca0abc
1 changed files with 88 additions and 52 deletions
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140
channels/rdpdr/parallel/parallel_main.c
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@ -21,12 +21,16 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <linux/ppdev.h>
#include <linux/parport.h>
#include <freerdp/types.h>
#include <freerdp/constants.h>
#include <freerdp/utils/list.h>
@ -44,110 +48,137 @@ struct _PARALLEL_DEVICE
int file;
char* path;
uint32 id;
LIST* irp_list;
freerdp_thread* thread;
};
typedef struct _PARALLEL_DEVICE PARALLEL_DEVICE;
static int get_error_status()
{
int status = 0;
switch (errno)
{
case EAGAIN:
status = STATUS_DEVICE_OFF_LINE;
break;
case ENOSPC:
status = STATUS_DEVICE_PAPER_EMPTY;
break;
case EIO:
status = STATUS_DEVICE_OFF_LINE;
break;
default:
status = STATUS_DEVICE_POWERED_OFF;
break;
}
return status;
}
static void parallel_process_irp_create(PARALLEL_DEVICE* parallel, IRP* irp)
{
parallel->file = open(parallel->path, O_RDWR);
uint32 PathLength;
char* path;
UNICONV* uniconv;
stream_seek(irp->input, 28);
/* DesiredAccess(4) AllocationSize(8), FileAttributes(4) */
/* SharedAccess(4) CreateDisposition(4), CreateOptions(4) */
stream_read_uint32(irp->input, PathLength);
uniconv = freerdp_uniconv_new();
path = freerdp_uniconv_in(uniconv, stream_get_tail(irp->input), PathLength);
freerdp_uniconv_free(uniconv);
parallel->id = irp->devman->id_sequence++;
parallel->file = open(parallel->path, O_RDWR);
if (parallel->file < 0)
{
perror("parallel open");
irp->IoStatus = STATUS_ACCESS_DENIED;
return;
parallel->id = 0;
DEBUG_WARN("failed to create %s: %s", parallel->path, strerror(errno));
}
else
{
/* all read and write operations should be non-blocking */
if (fcntl(parallel->file, F_SETFL, O_NONBLOCK) == -1)
DEBUG_WARN("%s fcntl %s", path, strerror(errno));
DEBUG_SVC("%s(%d) created", parallel->path, parallel->file);
}
/* all read and write operations should be non-blocking */
if (fcntl(parallel->file, F_SETFL, O_NONBLOCK) == -1)
perror("fcntl");
stream_write_uint32(irp->output, parallel->id);
stream_write_uint8(irp->output, 0);
xfree(path);
irp->Complete(irp);
}
static void parallel_process_irp_close(PARALLEL_DEVICE* parallel, IRP* irp)
{
close(parallel->file);
if (close(parallel->file) < 0)
DEBUG_SVC("failed to close %s(%d)", parallel->path, parallel->id);
else
DEBUG_SVC("%s(%d) closed", parallel->path, parallel->id);
stream_write_zero(irp->output, 5); /* Padding(5) */
irp->Complete(irp);
}
static void parallel_process_irp_read(PARALLEL_DEVICE* parallel, IRP* irp)
{
uint32 length;
uint64 offset;
uint32 Length;
uint64 Offset;
ssize_t status;
uint8* buffer = NULL;
stream_read_uint32(irp->input, length);
stream_read_uint64(irp->input, offset);
stream_read_uint32(irp->input, Length);
stream_read_uint64(irp->input, Offset);
irp->output = stream_new(length);
buffer = (uint8*) xmalloc(Length);
status = read(parallel->file, irp->output->p, length);
status = read(parallel->file, irp->output->p, Length);
if (status < 0)
{
stream_free(irp->output);
irp->IoStatus = get_error_status();
return;
irp->IoStatus = STATUS_UNSUCCESSFUL;
xfree(buffer);
buffer = NULL;
Length = 0;
DEBUG_WARN("read %s(%d) failed", parallel->path, parallel->id);
}
else
{
DEBUG_SVC("read %llu-%llu from %d", Offset, Offset + Length, parallel->id);
}
stream_write_uint32(irp->output, Length);
if (Length > 0)
{
stream_check_size(irp->output, Length);
stream_write(irp->output, buffer, Length);
}
xfree(buffer);
irp->Complete(irp);
}
static void parallel_process_irp_write(PARALLEL_DEVICE* parallel, IRP* irp)
{
uint32 length;
uint64 offset;
uint32 Length;
uint64 Offset;
ssize_t status;
uint32 len;
stream_read_uint32(irp->input, length);
stream_read_uint64(irp->input, offset);
stream_read_uint32(irp->input, Length);
stream_read_uint64(irp->input, Offset);
stream_seek(irp->input, 20); /* Padding */
while (stream_get_left(irp->input))
DEBUG_SVC("Length %u Offset %llu", Length, Offset);
len = Length;
while (len > 0)
{
status = write(parallel->file, irp->input->p, stream_get_left(irp->input));
status = write(parallel->file, stream_get_tail(irp->input), len);
if (status < 0)
{
irp->IoStatus = get_error_status();
return;
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
DEBUG_WARN("write %s(%d) failed.", parallel->path, parallel->id);
break;
}
stream_seek(irp->input, status);
length += status;
len -= status;
}
stream_write_uint32(irp->output, length);
stream_write_uint32(irp->output, Length);
stream_write_uint8(irp->output, 0); /* Padding */
irp->Complete(irp);
@ -155,12 +186,15 @@ static void parallel_process_irp_write(PARALLEL_DEVICE* parallel, IRP* irp)
static void parallel_process_irp_device_control(PARALLEL_DEVICE* parallel, IRP* irp)
{
DEBUG_SVC("in");
stream_write_uint32(irp->output, 0); /* OutputBufferLength */
irp->Complete(irp);
}
static void parallel_process_irp(PARALLEL_DEVICE* parallel, IRP* irp)
{
DEBUG_SVC("MajorFunction %u", irp->MajorFunction);
switch (irp->MajorFunction)
{
case IRP_MJ_CREATE:
@ -247,6 +281,8 @@ static void parallel_free(DEVICE* device)
IRP* irp;
PARALLEL_DEVICE* parallel = (PARALLEL_DEVICE*) device;
DEBUG_SVC("freeing device");
freerdp_thread_stop(parallel->thread);
freerdp_thread_free(parallel->thread);