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#define MAX_PARALLEL_DEVICES 1
#define FILE_DEVICE_PARALLEL 0x22
#define IOCTL_PAR_QUERY_RAW_DEVICE_ID 0x0c
#include "rdesktop.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#if defined(__linux__)
#include <linux/lp.h>
#endif
extern int errno;
extern RDPDR_DEVICE g_rdpdr_device[];
static PARALLEL_DEVICE *
get_parallel_data(NTHANDLE handle)
{
int index;
for (index = 0; index < RDPDR_MAX_DEVICES; index++)
{
if (handle == g_rdpdr_device[index].handle)
return (PARALLEL_DEVICE *) g_rdpdr_device[index].pdevice_data;
}
return NULL;
}
/* Enumeration of devices from rdesktop.c */
/* returns numer of units found and initialized. */
/* optarg looks like ':LPT1=/dev/lp0' */
/* when it arrives to this function. */
int
parallel_enum_devices(uint32 * id, char *optarg)
{
PARALLEL_DEVICE *ppar_info;
char *pos = optarg;
char *pos2;
int count = 0;
// skip the first colon
optarg++;
while ((pos = next_arg(optarg, ',')) && *id < RDPDR_MAX_DEVICES)
{
ppar_info = (PARALLEL_DEVICE *) xmalloc(sizeof(PARALLEL_DEVICE));
pos2 = next_arg(optarg, '=');
strcpy(g_rdpdr_device[*id].name, optarg);
toupper_str(g_rdpdr_device[*id].name);
g_rdpdr_device[*id].local_path = xmalloc(strlen(pos2) + 1);
strcpy(g_rdpdr_device[*id].local_path, pos2);
printf("PARALLEL %s to %s\n", optarg, pos2);
// set device type
g_rdpdr_device[*id].device_type = DEVICE_TYPE_PARALLEL;
g_rdpdr_device[*id].pdevice_data = (void *) ppar_info;
g_rdpdr_device[*id].handle = 0;
count++;
(*id)++;
optarg = pos;
}
return count;
}
static NTSTATUS
parallel_create(uint32 device_id, uint32 access, uint32 share_mode, uint32 disposition,
uint32 flags, char *filename, NTHANDLE * handle)
{
int parallel_fd;
parallel_fd = open(g_rdpdr_device[device_id].local_path, O_RDWR);
if (parallel_fd == -1)
{
perror("open");
return STATUS_ACCESS_DENIED;
}
/* all read and writes should be non blocking */
if (fcntl(parallel_fd, F_SETFL, O_NONBLOCK) == -1)
perror("fcntl");
#if defined(LPABORT)
/* Retry on errors */
ioctl(parallel_fd, LPABORT, (int) 1);
#endif
g_rdpdr_device[device_id].handle = parallel_fd;
*handle = parallel_fd;
return STATUS_SUCCESS;
}
static NTSTATUS
parallel_close(NTHANDLE handle)
{
int i = get_device_index(handle);
if (i >= 0)
g_rdpdr_device[i].handle = 0;
close(handle);
return STATUS_SUCCESS;
}
static NTSTATUS
parallel_read(NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
{
*result = read(handle, data, length);
return STATUS_SUCCESS;
}
static NTSTATUS
parallel_write(NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
{
int rc = STATUS_SUCCESS;
int n = write(handle, data, length);
if (n < 0)
{
int status;
*result = 0;
switch (errno)
{
case EAGAIN:
rc = STATUS_DEVICE_OFF_LINE;
case ENOSPC:
rc = STATUS_DEVICE_PAPER_EMPTY;
case EIO:
rc = STATUS_DEVICE_OFF_LINE;
default:
rc = STATUS_DEVICE_POWERED_OFF;
}
#if defined(LPGETSTATUS)
if (ioctl(handle, LPGETSTATUS, &status) == 0)
{
/* coming soon: take care for the printer status */
printf("parallel_write: status = %d, errno = %d\n", status, errno);
}
#endif
}
*result = n;
return rc;
}
static NTSTATUS
parallel_device_control(NTHANDLE handle, uint32 request, STREAM in, STREAM out)
{
if ((request >> 16) != FILE_DEVICE_PARALLEL)
return STATUS_INVALID_PARAMETER;
/* extract operation */
request >>= 2;
request &= 0xfff;
printf("PARALLEL IOCTL %d: ", request);
switch (request)
{
case IOCTL_PAR_QUERY_RAW_DEVICE_ID:
default:
printf("\n");
unimpl("UNKNOWN IOCTL %d\n", request);
}
return STATUS_SUCCESS;
}
DEVICE_FNS parallel_fns = {
parallel_create,
parallel_close,
parallel_read,
parallel_write,
parallel_device_control
};
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