202 lines
4.7 KiB
C
202 lines
4.7 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define MAX_PARALLEL_DEVICES 1
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#define FILE_DEVICE_PARALLEL 0x22
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#define IOCTL_PAR_QUERY_RAW_DEVICE_ID 0x0c
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#include "rdesktop.h"
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#if defined(__linux__)
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#include <linux/lp.h>
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#endif
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extern RDPDR_DEVICE g_rdpdr_device[];
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/* Enumeration of devices from rdesktop.c */
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/* returns number of units found and initialized. */
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/* optarg looks like ':LPT1=/dev/lp0' */
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/* when it arrives to this function. */
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int
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parallel_enum_devices(uint32 * id, char *optarg)
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{
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PARALLEL_DEVICE *ppar_info;
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char *pos = optarg;
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char *pos2;
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int count = 0;
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/* skip the first colon */
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optarg++;
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while ((pos = next_arg(optarg, ',')) && *id < RDPDR_MAX_DEVICES)
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{
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ppar_info = (PARALLEL_DEVICE *) xmalloc(sizeof(PARALLEL_DEVICE));
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pos2 = next_arg(optarg, '=');
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strcpy(g_rdpdr_device[*id].name, optarg);
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toupper_str(g_rdpdr_device[*id].name);
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g_rdpdr_device[*id].local_path = xmalloc(strlen(pos2) + 1);
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strcpy(g_rdpdr_device[*id].local_path, pos2);
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logger(Core, Debug, "parallel_enum_devices(), %s to %s", optarg, pos2);
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/* set device type */
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g_rdpdr_device[*id].device_type = DEVICE_TYPE_PARALLEL;
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g_rdpdr_device[*id].pdevice_data = (void *) ppar_info;
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g_rdpdr_device[*id].handle = 0;
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count++;
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(*id)++;
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optarg = pos;
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}
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return count;
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}
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static RD_NTSTATUS
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parallel_create(uint32 device_id, uint32 access, uint32 share_mode, uint32 disposition,
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uint32 flags, char *filename, RD_NTHANDLE * handle)
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{
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UNUSED(access);
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UNUSED(share_mode);
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UNUSED(disposition);
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UNUSED(flags);
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UNUSED(filename);
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int parallel_fd;
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parallel_fd = open(g_rdpdr_device[device_id].local_path, O_RDWR);
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if (parallel_fd == -1)
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{
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logger(Core, Error, "parallel_create(), open failed: %s", strerror(errno));
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return RD_STATUS_ACCESS_DENIED;
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}
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/* all read and writes should be non blocking */
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if (fcntl(parallel_fd, F_SETFL, O_NONBLOCK) == -1)
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logger(Core, Error, "parallel_create(), fcntl failed: %s", strerror(errno));
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#if defined(LPABORT)
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/* Retry on errors */
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ioctl(parallel_fd, LPABORT, (int) 1);
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#endif
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g_rdpdr_device[device_id].handle = parallel_fd;
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*handle = parallel_fd;
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return RD_STATUS_SUCCESS;
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}
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static RD_NTSTATUS
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parallel_close(RD_NTHANDLE handle)
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{
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int i = get_device_index(handle);
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if (i >= 0)
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g_rdpdr_device[i].handle = 0;
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close(handle);
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return RD_STATUS_SUCCESS;
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}
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static RD_NTSTATUS
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parallel_read(RD_NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
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{
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UNUSED(offset);
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*result = read(handle, data, length);
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return RD_STATUS_SUCCESS;
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}
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static RD_NTSTATUS
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parallel_write(RD_NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
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{
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UNUSED(offset);
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int rc = RD_STATUS_SUCCESS;
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int n = write(handle, data, length);
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if (n < 0)
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{
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#if defined(LPGETSTATUS)
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int status;
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#endif
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*result = 0;
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switch (errno)
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{
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case EAGAIN:
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rc = RD_STATUS_DEVICE_OFF_LINE;
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break;
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case ENOSPC:
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rc = RD_STATUS_DEVICE_PAPER_EMPTY;
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break;
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case EIO:
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rc = RD_STATUS_DEVICE_OFF_LINE;
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break;
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default:
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rc = RD_STATUS_DEVICE_POWERED_OFF;
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break;
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}
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#if defined(LPGETSTATUS)
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if (ioctl(handle, LPGETSTATUS, &status) == 0)
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{
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logger(Core, Error, "parellel_write(), ioctl failed: %s", strerror(errno));
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}
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#endif
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}
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*result = n;
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return rc;
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}
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static RD_NTSTATUS
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parallel_device_control(RD_NTHANDLE handle, uint32 request, STREAM in, STREAM out)
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{
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UNUSED(handle);
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UNUSED(in);
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UNUSED(out);
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if ((request >> 16) != FILE_DEVICE_PARALLEL)
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return RD_STATUS_INVALID_PARAMETER;
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/* extract operation */
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request >>= 2;
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request &= 0xfff;
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logger(Protocol, Debug, "parallel_device_control(), ioctl %d", request);
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switch (request)
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{
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case IOCTL_PAR_QUERY_RAW_DEVICE_ID:
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default:
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logger(Protocol, Warning, "parallel_device_control(), unhandled ioctl %d",
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request);
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}
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return RD_STATUS_SUCCESS;
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}
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DEVICE_FNS parallel_fns = {
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parallel_create,
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parallel_close,
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parallel_read,
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parallel_write,
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parallel_device_control
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};
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