source: vbox/trunk/src/VBox/RDP/client/printercache.c@ 40654

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Entrypoint and utility functions
   Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
   Copyright (C) Jeroen Meijer <jeroen@oldambt7.com> 2003-2008
  
   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/>.
*/

/*
 * Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
 * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
 * the General Public License version 2 (GPLv2) at this time for any software where
 * a choice of GPL license versions is made available with the language indicating
 * that GPLv2 or any later version may be used, or where a choice of which version
 * of the GPL is applied is otherwise unspecified.
 */

/* According to the W2K RDP Printer Redirection WhitePaper, a data
 * blob is sent to the client after the configuration of the printer
 * is changed at the server.
 *
 * This data blob is saved to the registry. The client returns this
 * data blob in a new session with the printer announce data.
 * The data is not interpreted by the client.
 */

#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include "rdesktop.h"

static RD_BOOL
printercache_mkdir(char *base, char *printer)
{
        char *path;

        path = (char *) xmalloc(strlen(base) + sizeof("/.rdesktop/rdpdr/") + strlen(printer) + 1);

        sprintf(path, "%s/.rdesktop", base);
        if ((mkdir(path, 0700) == -1) && errno != EEXIST)
        {
                perror(path);
                xfree(path);
                return False;
        }

        strcat(path, "/rdpdr");
        if ((mkdir(path, 0700) == -1) && errno != EEXIST)
        {
                perror(path);
                xfree(path);
                return False;
        }

        strcat(path, "/");
        strcat(path, printer);
        if ((mkdir(path, 0700) == -1) && errno != EEXIST)
        {
                perror(path);
                xfree(path);
                return False;
        }

        xfree(path);
        return True;
}

static RD_BOOL
printercache_unlink_blob(char *printer)
{
        char *path;
        char *home;

        if (printer == NULL)
                return False;

        home = getenv("HOME");
        if (home == NULL)
                return False;

        path = (char *) xmalloc(strlen(home) + sizeof("/.rdesktop/rdpdr/") + strlen(printer) +
                                sizeof("/AutoPrinterCacheData") + 1);

        sprintf(path, "%s/.rdesktop/rdpdr/%s/AutoPrinterCacheData", home, printer);

        if (unlink(path) < 0)
        {
                xfree(path);
                return False;
        }

        sprintf(path, "%s/.rdesktop/rdpdr/%s", home, printer);

        if (rmdir(path) < 0)
        {
                xfree(path);
                return False;
        }

        xfree(path);
        return True;
}


static RD_BOOL
printercache_rename_blob(char *printer, char *new_printer)
{
        char *printer_path;
        char *new_printer_path;
        int printer_maxlen;

        char *home;

        if (printer == NULL)
                return False;

        home = getenv("HOME");
        if (home == NULL)
                return False;

        printer_maxlen =
                (strlen(printer) >
                 strlen(new_printer) ? strlen(printer) : strlen(new_printer)) + strlen(home) +
                sizeof("/.rdesktop/rdpdr/") + 1;

        printer_path = (char *) xmalloc(printer_maxlen);
        new_printer_path = (char *) xmalloc(printer_maxlen);

        sprintf(printer_path, "%s/.rdesktop/rdpdr/%s", home, printer);
        sprintf(new_printer_path, "%s/.rdesktop/rdpdr/%s", home, new_printer);

        printf("%s,%s\n", printer_path, new_printer_path);
        if (rename(printer_path, new_printer_path) < 0)
        {
                xfree(printer_path);
                xfree(new_printer_path);
                return False;
        }

        xfree(printer_path);
        xfree(new_printer_path);
        return True;
}


int
printercache_load_blob(char *printer_name, uint8 ** data)
{
        char *home, *path;
        struct stat st;
        int fd, length;

        if (printer_name == NULL)
                return 0;

        *data = NULL;

        home = getenv("HOME");
        if (home == NULL)
                return 0;

        path = (char *) xmalloc(strlen(home) + sizeof("/.rdesktop/rdpdr/") + strlen(printer_name) +
                                sizeof("/AutoPrinterCacheData") + 1);
        sprintf(path, "%s/.rdesktop/rdpdr/%s/AutoPrinterCacheData", home, printer_name);

        fd = open(path, O_RDONLY);
        if (fd == -1)
        {
                xfree(path);
                return 0;
        }

        if (fstat(fd, &st))
        {
                xfree(path);
                return 0;
        }

        *data = (uint8 *) xmalloc(st.st_size);
        length = read(fd, *data, st.st_size);
        close(fd);
        xfree(path);
        return length;
}

static void
printercache_save_blob(char *printer_name, uint8 * data, uint32 length)
{
        char *home, *path;
        int fd;

        if (printer_name == NULL)
                return;

        home = getenv("HOME");
        if (home == NULL)
                return;

        if (!printercache_mkdir(home, printer_name))
                return;

        path = (char *) xmalloc(strlen(home) + sizeof("/.rdesktop/rdpdr/") + strlen(printer_name) +
                                sizeof("/AutoPrinterCacheData") + 1);
        sprintf(path, "%s/.rdesktop/rdpdr/%s/AutoPrinterCacheData", home, printer_name);

        fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
        if (fd == -1)
        {
                perror(path);
                xfree(path);
                return;
        }

        if (write(fd, data, length) != length)
        {
                perror(path);
                unlink(path);
        }

        close(fd);
        xfree(path);
}

void
printercache_process(STREAM s)
{
        uint32 type, printer_length, driver_length, printer_unicode_length, blob_length;
        char device_name[9], printer[256], driver[256];

        in_uint32_le(s, type);
        switch (type)
        {
                case 4: /* rename item */
                        in_uint8(s, printer_length);
                        in_uint8s(s, 0x3);      /* padding */
                        in_uint8(s, driver_length);
                        in_uint8s(s, 0x3);      /* padding */

                        /* NOTE - 'driver' doesn't contain driver, it contains the new printer name */

                        rdp_in_unistr(s, printer, sizeof(printer), printer_length);
                        rdp_in_unistr(s, driver, sizeof(driver), driver_length);

                        printercache_rename_blob(printer, driver);
                        break;

                case 3: /* delete item */
                        in_uint8(s, printer_unicode_length);
                        in_uint8s(s, 0x3);      /* padding */
                        rdp_in_unistr(s, printer, sizeof(printer), printer_unicode_length);
                        printercache_unlink_blob(printer);
                        break;

                case 2: /* save printer data */
                        in_uint32_le(s, printer_unicode_length);
                        in_uint32_le(s, blob_length);

                        if (printer_unicode_length < 2 * 255)
                        {
                                rdp_in_unistr(s, printer, sizeof(printer), printer_unicode_length);
                                printercache_save_blob(printer, s->p, blob_length);
                        }
                        break;

                case 1: /* save device data */
                        in_uint8a(s, device_name, 5);   /* get LPTx/COMx name */

                        /* need to fetch this data so that we can get the length of the packet to store. */
                        in_uint8s(s, 0x2);      /* ??? */
                        in_uint8s(s, 0x2)       /* pad?? */
                                in_uint32_be(s, driver_length);
                        in_uint32_be(s, printer_length);
                        in_uint8s(s, 0x7)       /* pad?? */
                                /* next is driver in unicode */
                                /* next is printer in unicode */
                                /* TODO: figure out how to use this information when reconnecting */
                                /* actually - all we need to store is the driver and printer */
                                /* and figure out what the first word is. */
                                /* rewind stream so that we can save this blob   */
                                /* length is driver_length + printer_length + 19 */
                                /* rewind stream */
                                s->p = s->p - 19;

                        printercache_save_blob(device_name, s->p,
                                               driver_length + printer_length + 19);
                        break;
                default:

                        unimpl("RDPDR Printer Cache Packet Type: %d\n", type);
                        break;
        }
}