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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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 RDPDR_DEVICE g_rdpdr_device[];
/* Enumeration of devices from rdesktop.c */
/* returns number 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);
logger(Core, Debug, "parallel_enum_devices(), %s to %s", 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 RD_NTSTATUS
parallel_create(uint32 device_id, uint32 access, uint32 share_mode, uint32 disposition,
uint32 flags, char *filename, RD_NTHANDLE * handle)
{
UNUSED(access);
UNUSED(share_mode);
UNUSED(disposition);
UNUSED(flags);
UNUSED(filename);
int parallel_fd;
parallel_fd = open(g_rdpdr_device[device_id].local_path, O_RDWR);
if (parallel_fd == -1)
{
logger(Core, Error, "parallel_create(), open failed: %s", strerror(errno));
return RD_STATUS_ACCESS_DENIED;
}
/* all read and writes should be non blocking */
if (fcntl(parallel_fd, F_SETFL, O_NONBLOCK) == -1)
logger(Core, Error, "parallel_create(), fcntl failed: %s", strerror(errno));
#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 RD_STATUS_SUCCESS;
}
static RD_NTSTATUS
parallel_close(RD_NTHANDLE handle)
{
int i = get_device_index(handle);
if (i >= 0)
g_rdpdr_device[i].handle = 0;
close(handle);
return RD_STATUS_SUCCESS;
}
static RD_NTSTATUS
parallel_read(RD_NTHANDLE handle, uint8 * data, uint32 length, uint64 offset, uint32 * result)
{
UNUSED(offset); /* Offset must always be zero according to MS-RDPESP */
*result = read(handle, data, length);
return RD_STATUS_SUCCESS;
}
static RD_NTSTATUS
parallel_write(RD_NTHANDLE handle, uint8 * data, uint32 length, uint64 offset, uint32 * result)
{
UNUSED(offset); /* Offset must always be zero according to MS-RDPESP */
int rc = RD_STATUS_SUCCESS;
int n = write(handle, data, length);
if (n < 0)
{
#if defined(LPGETSTATUS)
int status;
#endif
*result = 0;
switch (errno)
{
case EAGAIN:
rc = RD_STATUS_DEVICE_OFF_LINE;
break;
case ENOSPC:
rc = RD_STATUS_DEVICE_PAPER_EMPTY;
break;
case EIO:
rc = RD_STATUS_DEVICE_OFF_LINE;
break;
default:
rc = RD_STATUS_DEVICE_POWERED_OFF;
break;
}
#if defined(LPGETSTATUS)
if (ioctl(handle, LPGETSTATUS, &status) == 0)
{
logger(Core, Error, "parellel_write(), ioctl failed: %s", strerror(errno));
}
#endif
}
*result = n;
return rc;
}
static RD_NTSTATUS
parallel_device_control(RD_NTHANDLE handle, uint32 request, STREAM in, STREAM out)
{
UNUSED(handle);
UNUSED(in);
UNUSED(out);
if ((request >> 16) != FILE_DEVICE_PARALLEL)
return RD_STATUS_INVALID_PARAMETER;
/* extract operation */
request >>= 2;
request &= 0xfff;
logger(Protocol, Debug, "parallel_device_control(), ioctl %d", request);
switch (request)
{
case IOCTL_PAR_QUERY_RAW_DEVICE_ID:
default:
logger(Protocol, Warning, "parallel_device_control(), unhandled ioctl %d",
request);
}
return RD_STATUS_SUCCESS;
}
DEVICE_FNS parallel_fns = {
parallel_create,
parallel_close,
parallel_read,
parallel_write,
parallel_device_control
};
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