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rdpdr.c
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rdpdr.c
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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
Copyright 2004-2011 Peter Astrand <[email protected]> for Cendio AB
Copyright 2010-2017 Henrik Andersson <[email protected]> for Cendio AB
Copyright 2017-2019 Karl Mikaelsson <[email protected]> for Cendio AB
Copyright 2016, 2018 Alexander Zakharov <[email protected]>
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/>.
*/
/*
Here are some resources, for your IRP hacking pleasure:
http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/winddk.h?view=markup
http://win32.mvps.org/ntfs/streams.cpp
http://www.acc.umu.se/~bosse/ntifs.h
http://undocumented.ntinternals.net/UserMode/Undocumented%20Functions/NT%20Objects/File/
http://us1.samba.org/samba/ftp/specs/smb-nt01.txt
http://www.osronline.com/
*/
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <dirent.h> /* opendir, closedir, readdir */
#include <time.h>
#include <errno.h>
#include "rdesktop.h"
#define IRP_MJ_CREATE 0x00
#define IRP_MJ_CLOSE 0x02
#define IRP_MJ_READ 0x03
#define IRP_MJ_WRITE 0x04
#define IRP_MJ_QUERY_INFORMATION 0x05
#define IRP_MJ_SET_INFORMATION 0x06
#define IRP_MJ_QUERY_VOLUME_INFORMATION 0x0a
#define IRP_MJ_DIRECTORY_CONTROL 0x0c
#define IRP_MJ_DEVICE_CONTROL 0x0e
#define IRP_MJ_LOCK_CONTROL 0x11
#define IRP_MN_QUERY_DIRECTORY 0x01
#define IRP_MN_NOTIFY_CHANGE_DIRECTORY 0x02
extern char g_hostname[16];
extern DEVICE_FNS serial_fns;
extern DEVICE_FNS printer_fns;
extern DEVICE_FNS parallel_fns;
extern DEVICE_FNS disk_fns;
#ifdef WITH_SCARD
extern DEVICE_FNS scard_fns;
#endif
extern FILEINFO g_fileinfo[];
extern RD_BOOL g_notify_stamp;
static VCHANNEL *rdpdr_channel;
static uint32 g_epoch;
/* If select() times out, the request for the device with handle g_min_timeout_fd is aborted */
RD_NTHANDLE g_min_timeout_fd;
uint32 g_num_devices;
uint32 g_client_id;
/* Table with information about rdpdr devices */
RDPDR_DEVICE g_rdpdr_device[RDPDR_MAX_DEVICES];
char *g_rdpdr_clientname = NULL;
/* Used to store incoming io request, until they are ready to be completed */
/* using a linked list ensures that they are processed in the right order, */
/* if multiple IOs are being done on the same FD */
struct async_iorequest
{
uint32 fd, major, minor, device, id, length, partial_len;
uint64 offset;
long timeout, /* Total timeout */
itv_timeout; /* Interval timeout (between serial characters) */
uint8 *buffer;
DEVICE_FNS *fns;
struct async_iorequest *next; /* next element in list */
};
struct async_iorequest *g_iorequest;
/* Return device_id for a given handle */
int
get_device_index(RD_NTHANDLE handle)
{
int i;
for (i = 0; i < RDPDR_MAX_DEVICES; i++)
{
if (g_rdpdr_device[i].handle == handle)
return i;
}
return -1;
}
/* Converts a windows path to a unix path */
void
convert_to_unix_filename(char *filename)
{
char *p;
while ((p = strchr(filename, '\\')))
{
*p = '/';
}
}
static RD_BOOL
rdpdr_handle_ok(uint32 device, RD_NTHANDLE handle)
{
switch (g_rdpdr_device[device].device_type)
{
case DEVICE_TYPE_PARALLEL:
case DEVICE_TYPE_SERIAL:
case DEVICE_TYPE_PRINTER:
case DEVICE_TYPE_SCARD:
if (g_rdpdr_device[device].handle != handle)
return False;
break;
case DEVICE_TYPE_DISK:
if (g_fileinfo[handle].device_id != device)
return False;
break;
}
return True;
}
/* Add a new io request to the table containing pending io requests so it won't block rdesktop */
static RD_BOOL
add_async_iorequest(uint32 device, uint32 file, uint32 id, uint32 major, uint32 length,
DEVICE_FNS * fns, uint32 total_timeout, uint32 interval_timeout, uint8 * buffer,
uint64 offset)
{
struct async_iorequest *iorq;
if (g_iorequest == NULL)
{
g_iorequest = (struct async_iorequest *) xmalloc(sizeof(struct async_iorequest));
if (!g_iorequest)
return False;
g_iorequest->fd = 0;
g_iorequest->next = NULL;
}
iorq = g_iorequest;
while (iorq->fd != 0)
{
/* create new element if needed */
if (iorq->next == NULL)
{
iorq->next =
(struct async_iorequest *) xmalloc(sizeof(struct async_iorequest));
if (!iorq->next)
return False;
iorq->next->fd = 0;
iorq->next->next = NULL;
}
iorq = iorq->next;
}
iorq->device = device;
iorq->fd = file;
iorq->id = id;
iorq->major = major;
iorq->length = length;
iorq->partial_len = 0;
iorq->fns = fns;
iorq->timeout = total_timeout;
iorq->itv_timeout = interval_timeout;
iorq->buffer = buffer;
iorq->offset = offset;
return True;
}
static void
rdpdr_send_client_announce_reply(void)
{
/* DR_CORE_CLIENT_ANNOUNCE_RSP */
STREAM s;
s = channel_init(rdpdr_channel, 12);
out_uint16_le(s, RDPDR_CTYP_CORE);
out_uint16_le(s, PAKID_CORE_CLIENTID_CONFIRM);
out_uint16_le(s, 1); /* VersionMajor, MUST be set to 0x1 */
out_uint16_le(s, 5); /* VersionMinor */
out_uint32_be(s, g_client_id); /* ClientID */
s_mark_end(s);
channel_send(s, rdpdr_channel);
}
static void
rdpdr_send_client_name_request(void)
{
/* DR_CORE_CLIENT_NAME_REQ */
STREAM s;
struct stream name = { 0 };
if (NULL == g_rdpdr_clientname)
{
g_rdpdr_clientname = g_hostname;
}
s_realloc(&name, 512 * 4);
s_reset(&name);
out_utf16s(&name, g_rdpdr_clientname);
s_mark_end(&name);
s = channel_init(rdpdr_channel, 16 + s_length(&name));
out_uint16_le(s, RDPDR_CTYP_CORE);
out_uint16_le(s, PAKID_CORE_CLIENT_NAME);
out_uint32_le(s, 1); /* UnicodeFlag */
out_uint32_le(s, 0); /* CodePage */
out_uint32_le(s, s_length(&name)); /* ComputerNameLen */
out_stream(s, &name);
s_mark_end(s);
channel_send(s, rdpdr_channel);
}
/* Returns the size of the payload of the announce packet */
static size_t
announcedata_size()
{
size_t size, i;
PRINTER *printerinfo;
DISK_DEVICE *diskinfo;
size = 8; /* Header + DeviceCount */
for (i = 0; i < g_num_devices; i++)
{
size += 4; /* DeviceType */
size += 4; /* DeviceId */
size += 8; /* PreferredDosName */
size += 4; /* DeviceDataLength */
switch (g_rdpdr_device[i].device_type)
{
case DEVICE_TYPE_DISK:
diskinfo = (DISK_DEVICE *) g_rdpdr_device[i].pdevice_data;
size += 2 * strlen(diskinfo->name) + 2;
break;
case DEVICE_TYPE_PRINTER:
printerinfo = (PRINTER *) g_rdpdr_device[i].pdevice_data;
printerinfo->bloblen =
printercache_load_blob(printerinfo->printer,
&(printerinfo->blob));
size += 0x18;
size += 2 * strlen(printerinfo->driver) + 2;
size += 2 * strlen(printerinfo->printer) + 2;
size += printerinfo->bloblen;
break;
default:
break;
}
}
return size;
}
static void
rdpdr_send_client_device_list_announce(void)
{
/* DR_CORE_CLIENT_ANNOUNCE_RSP */
uint32 bloblen, disklen, flags;
size_t i;
STREAM s;
PRINTER *printerinfo;
DISK_DEVICE *diskinfo;
struct stream drv = { 0 }, prt =
{
0};
s = channel_init(rdpdr_channel, announcedata_size());
out_uint16_le(s, RDPDR_CTYP_CORE);
out_uint16_le(s, PAKID_CORE_DEVICE_LIST_ANNOUNCE);
out_uint32_le(s, g_num_devices);
for (i = 0; i < g_num_devices; i++) /* DEVICE_ANNOUNCE */
{
out_uint32_le(s, g_rdpdr_device[i].device_type);
out_uint32_le(s, i); /* RDP Device ID */
out_uint8p(s, g_rdpdr_device[i].name, 8); /* preferredDosName, limited to 8 characters */
switch (g_rdpdr_device[i].device_type)
{
case DEVICE_TYPE_DISK:
diskinfo = (DISK_DEVICE *) g_rdpdr_device[i].pdevice_data;
/* The RDP specification says that the DeviceData is supposed to be
a null-terminated Unicode string, but that does not work. In
practice the string is expected to be an ASCII string, like a
variable-length preferredDosName. */
disklen = strlen(diskinfo->name) + 1;
out_uint32_le(s, disklen); /* DeviceDataLength */
out_uint8p(s, diskinfo->name, disklen); /* DeviceData */
break;
case DEVICE_TYPE_PRINTER:
printerinfo = (PRINTER *) g_rdpdr_device[i].pdevice_data;
s_realloc(&prt, 512 * 4);
s_reset(&prt);
out_utf16s(&prt, printerinfo->printer);
s_mark_end(&prt);
s_realloc(&drv, 512 * 4);
s_reset(&drv);
out_utf16s(&drv, printerinfo->driver);
s_mark_end(&drv);
bloblen = printerinfo->bloblen;
flags = 0;
if (printerinfo->default_printer)
flags |= RDPDR_PRINTER_ANNOUNCE_FLAG_DEFAULTPRINTER;
out_uint32_le(s, 24 + s_length(&drv) + s_length(&prt) + bloblen); /* DeviceDataLength */
out_uint32_le(s, flags); /* Flags */
out_uint32_le(s, 0); /* Codepage */
out_uint32_le(s, 0); /* PnPNameLen */
out_uint32_le(s, s_length(&drv)); /* DriverNameLen */
out_uint32_le(s, s_length(&prt)); /* PrinterNameLen */
out_uint32_le(s, bloblen); /* CachedFieldsLen */
// out_uint8s(s, 0); /* PnPName (Skipped) */
out_stream(s, &drv); /* DriverName */
out_stream(s, &prt); /* PrinterName */
out_uint8a(s, printerinfo->blob, bloblen); /* CachedPrinterConfigData */
if (printerinfo->blob)
xfree(printerinfo->blob); /* Blob is sent twice if reconnecting */
break;
default:
out_uint32(s, 0);
}
}
s_mark_end(s);
channel_send(s, rdpdr_channel);
}
void
rdpdr_send_completion(uint32 device, uint32 id, uint32 status, uint32 result, uint8 * buffer,
uint32 length)
{
STREAM s;
#ifdef WITH_SCARD
scard_lock(SCARD_LOCK_RDPDR);
#endif
if (status == RD_STATUS_BUFFER_TOO_SMALL) {
/*
* Not enough space has been allocated by server to store the result.
* Send STATUS_BUFFER_TOO_SMALL error as a IoStatus.
*/
result = 0;
length = 0;
}
s = channel_init(rdpdr_channel, 20 + length);
out_uint16_le(s, RDPDR_CTYP_CORE);
out_uint16_le(s, PAKID_CORE_DEVICE_IOCOMPLETION);
out_uint32_le(s, device);
out_uint32_le(s, id);
out_uint32_le(s, status);
out_uint32_le(s, result);
if (length)
out_uint8p(s, buffer, length);
s_mark_end(s);
logger(Protocol, Debug, "rdpdr_send_completion()");
/* hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8); */
channel_send(s, rdpdr_channel);
#ifdef WITH_SCARD
scard_unlock(SCARD_LOCK_RDPDR);
#endif
}
/* Processes a DR_DEVICE_IOREQUEST (minus the leading header field) */
static void
rdpdr_process_irp(STREAM s)
{
uint32 result = 0,
length = 0,
desired_access = 0,
request,
file,
info_level,
buffer_len,
id,
major,
minor,
device,
bytes_out,
share_mode, disposition, total_timeout, interval_timeout, flags_and_attributes = 0;
uint64 offset;
char *filename;
uint32 filename_len;
uint8 *buffer, *pst_buf;
struct stream out;
DEVICE_FNS *fns;
RD_BOOL rw_blocking = True;
RD_NTSTATUS status = RD_STATUS_INVALID_DEVICE_REQUEST;
in_uint32_le(s, device);
in_uint32_le(s, file);
in_uint32_le(s, id);
in_uint32_le(s, major);
in_uint32_le(s, minor);
filename = NULL;
buffer_len = 0;
buffer = (uint8 *) xmalloc(1024);
buffer[0] = 0;
if (device >= RDPDR_MAX_DEVICES)
{
logger(Protocol, Error,
"rdpdr_process_irp(), invalid irp device=0x%lx, file=0x%lx, id=0x%lx, major=0x%lx, minor=0x%lx",
device, file, id, major, minor);
xfree(buffer);
return;
}
switch (g_rdpdr_device[device].device_type)
{
case DEVICE_TYPE_SERIAL:
fns = &serial_fns;
rw_blocking = False;
break;
case DEVICE_TYPE_PARALLEL:
fns = ¶llel_fns;
rw_blocking = False;
break;
case DEVICE_TYPE_PRINTER:
fns = &printer_fns;
break;
case DEVICE_TYPE_DISK:
fns = &disk_fns;
rw_blocking = False;
break;
case DEVICE_TYPE_SCARD:
#ifdef WITH_SCARD
fns = &scard_fns;
rw_blocking = False;
break;
#endif
default:
logger(Protocol, Error,
"rdpdr_process_irp(), received IRP for unknown device type %ld",
device);
xfree(buffer);
return;
}
switch (major)
{
case IRP_MJ_CREATE:
in_uint32_be(s, desired_access);
in_uint8s(s, 0x08); /* unknown */
in_uint8s(s, 4); /* skip error_mode */
in_uint32_le(s, share_mode);
in_uint32_le(s, disposition);
in_uint32_le(s, flags_and_attributes);
in_uint32_le(s, length);
if (length && (length / 2) < 256)
{
rdp_in_unistr(s, length, &filename, &filename_len);
if (filename)
convert_to_unix_filename(filename);
}
if (!fns->create)
{
status = RD_STATUS_NOT_SUPPORTED;
free(filename);
break;
}
status = fns->create(device, desired_access, share_mode, disposition,
flags_and_attributes, filename, &result);
free(filename);
buffer_len = 1;
break;
case IRP_MJ_CLOSE:
if (!fns->close)
{
status = RD_STATUS_NOT_SUPPORTED;
break;
}
status = fns->close(file);
break;
case IRP_MJ_READ:
if (!fns->read)
{
status = RD_STATUS_NOT_SUPPORTED;
break;
}
in_uint32_le(s, length);
in_uint64_le(s, offset);
in_uint8s(s, 20); /* 20 bytes of padding */
logger(Protocol, Debug,
"rdpdr_process_irp(), IRP Read length=%d, offset=%ld",
length, offset);
if (!rdpdr_handle_ok(device, file))
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
if (rw_blocking) /* Complete read immediately */
{
buffer = (uint8 *) xrealloc((void *) buffer, length);
if (!buffer)
{
status = RD_STATUS_CANCELLED;
break;
}
status = fns->read(file, buffer, length, offset, &result);
buffer_len = result;
break;
}
/* Add request to table */
pst_buf = (uint8 *) xmalloc(length);
if (!pst_buf)
{
status = RD_STATUS_CANCELLED;
break;
}
serial_get_timeout(file, length, &total_timeout, &interval_timeout);
if (add_async_iorequest
(device, file, id, major, length, fns, total_timeout, interval_timeout,
pst_buf, offset))
{
status = RD_STATUS_PENDING;
break;
}
status = RD_STATUS_CANCELLED;
break;
case IRP_MJ_WRITE:
buffer_len = 1;
if (!fns->write)
{
status = RD_STATUS_NOT_SUPPORTED;
break;
}
in_uint32_le(s, length);
in_uint64_le(s, offset);
in_uint8s(s, 20); /* 20 bytes of padding before WriteData */
logger(Protocol, Debug,
"rdpdr_process_irp(), IRP Write length=%d, offset=%ld",
result, offset);
if (!rdpdr_handle_ok(device, file))
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
if (rw_blocking) /* Complete immediately */
{
status = fns->write(file, s->p, length, offset, &result);
break;
}
/* Add to table */
pst_buf = (uint8 *) xmalloc(length);
if (!pst_buf)
{
status = RD_STATUS_CANCELLED;
break;
}
in_uint8a(s, pst_buf, length);
if (add_async_iorequest
(device, file, id, major, length, fns, 0, 0, pst_buf, offset))
{
status = RD_STATUS_PENDING;
break;
}
status = RD_STATUS_CANCELLED;
break;
case IRP_MJ_QUERY_INFORMATION:
if (g_rdpdr_device[device].device_type != DEVICE_TYPE_DISK)
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
in_uint32_le(s, info_level);
out.data = out.p = buffer;
out.size = sizeof(buffer);
status = disk_query_information(file, info_level, &out);
result = buffer_len = out.p - out.data;
break;
case IRP_MJ_SET_INFORMATION:
if (g_rdpdr_device[device].device_type != DEVICE_TYPE_DISK)
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
in_uint32_le(s, info_level);
out.data = out.p = buffer;
out.size = sizeof(buffer);
status = disk_set_information(file, info_level, s, &out);
result = buffer_len = out.p - out.data;
break;
case IRP_MJ_QUERY_VOLUME_INFORMATION:
if (g_rdpdr_device[device].device_type != DEVICE_TYPE_DISK)
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
in_uint32_le(s, info_level);
out.data = out.p = buffer;
out.size = sizeof(buffer);
status = disk_query_volume_information(file, info_level, &out);
result = buffer_len = out.p - out.data;
break;
case IRP_MJ_DIRECTORY_CONTROL:
if (g_rdpdr_device[device].device_type != DEVICE_TYPE_DISK)
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
switch (minor)
{
case IRP_MN_QUERY_DIRECTORY:
in_uint32_le(s, info_level);
in_uint8s(s, 1);
in_uint32_le(s, length);
in_uint8s(s, 0x17);
if (length && length < 2 * 255)
{
rdp_in_unistr(s, length, &filename, &filename_len);
if (filename)
convert_to_unix_filename(filename);
}
out.data = out.p = buffer;
out.size = sizeof(buffer);
status = disk_query_directory(file, info_level, filename,
&out);
result = buffer_len = out.p - out.data;
if (!buffer_len)
buffer_len++;
free(filename);
break;
case IRP_MN_NOTIFY_CHANGE_DIRECTORY:
/* JIF
unimpl("IRP major=0x%x minor=0x%x: IRP_MN_NOTIFY_CHANGE_DIRECTORY\n", major, minor); */
in_uint32_le(s, info_level); /* notify mask */
status = disk_create_notify(file, info_level);
result = 0;
if (status == RD_STATUS_PENDING)
add_async_iorequest(device, file, id, major, length,
fns, 0, 0, NULL, 0);
break;
default:
status = RD_STATUS_INVALID_PARAMETER;
/* JIF */
logger(Protocol, Warning,
"rdpdr_process_irp(), unhandled minor opcode, major=0x%x, minor=0x%x",
major, minor);
}
break;
case IRP_MJ_DEVICE_CONTROL:
if (!fns->device_control)
{
status = RD_STATUS_NOT_SUPPORTED;
break;
}
/* DR_CONTROL_REQ (2.2.1.4.5 of MS-RDPEFS) */
/* OutputBufferLength */
in_uint32_le(s, bytes_out);
in_uint8s(s, 4); /* skip bytes_in */
in_uint32_le(s, request);
/* Padding */
in_uint8s(s, 0x14);
/* TODO: Why do we need to increase length by padlen? Or is it hdr len? */
buffer = (uint8 *) xrealloc((void *) buffer, bytes_out + 0x14);
if (!buffer)
{
status = RD_STATUS_CANCELLED;
break;
}
out.data = out.p = buffer;
/* Guess, just a simple mistype. Check others */
//out.size = sizeof(buffer);
out.size = bytes_out + 0x14;
#ifdef WITH_SCARD
scardSetInfo(g_epoch, device, id, bytes_out + 0x14);
#endif
status = fns->device_control(file, request, s, &out);
result = buffer_len = out.p - out.data;
/* Serial SERIAL_WAIT_ON_MASK */
if (status == RD_STATUS_PENDING)
{
if (add_async_iorequest
(device, file, id, major, length, fns, 0, 0, NULL, 0))
{
status = RD_STATUS_PENDING;
break;
}
}
#ifdef WITH_SCARD
else if (status == (RD_STATUS_PENDING | 0xC0000000))
status = RD_STATUS_PENDING;
#endif
break;
case IRP_MJ_LOCK_CONTROL:
if (g_rdpdr_device[device].device_type != DEVICE_TYPE_DISK)
{
status = RD_STATUS_INVALID_HANDLE;
break;
}
in_uint32_le(s, info_level);
out.data = out.p = buffer;
out.size = sizeof(buffer);
/* FIXME: Perhaps consider actually *do*
something here :-) */
status = RD_STATUS_SUCCESS;
result = buffer_len = out.p - out.data;
break;
default:
logger(Protocol, Warning,
"rdpdr_process_irp(), unhandled major opcode, major=0x%x, minor=0x%x",
major, minor);
break;
}
if (status != RD_STATUS_PENDING)
{
rdpdr_send_completion(device, id, status, result, buffer, buffer_len);
}
if (buffer)
xfree(buffer);
buffer = NULL;
}
static void
rdpdr_send_client_capability_response(void)
{
/* DR_CORE_CAPABILITY_RSP */
STREAM s;
s = channel_init(rdpdr_channel, 0x50);
out_uint16_le(s, RDPDR_CTYP_CORE); /* Header */
out_uint16_le(s, PAKID_CORE_CLIENT_CAPABILITY); /* Header */
out_uint16_le(s, 5); /* numCapabilities */
out_uint16_le(s, 0); /* Padding */
out_uint16_le(s, CAP_GENERAL_TYPE); /* CapabilityType */
out_uint16_le(s, 0x28); /* CapabilityLength */
out_uint32_le(s, GENERAL_CAPABILITY_VERSION_01); /* Version */
out_uint32_le(s, 0); /* osType */
out_uint32_le(s, 0); /* osVersion */
out_uint16_le(s, 1); /* protocolMajorVersion */
out_uint16_le(s, 5); /* protocolMinorVersion */
out_uint32_le(s, ALL_RDPDR_IRP_MJ); /* ioCode1 */
out_uint32_le(s, 0); /* ioCode2 */
out_uint32_le(s, RDPDR_DEVICE_REMOVE_PDUS | RDPDR_CLIENT_DISPLAY_NAME_PDU); /* extendedPDU */
out_uint32_le(s, 0); /* extraFlags1 */
out_uint32_le(s, 0); /* extraFlags2 */
out_uint16_le(s, CAP_PRINTER_TYPE); /* CapabilityType */
out_uint16_le(s, 8); /* CapabilityLength */
out_uint32_le(s, PRINT_CAPABILITY_VERSION_01); /* Version */
out_uint16_le(s, CAP_PORT_TYPE); /* CapabilityType */
out_uint16_le(s, 8); /* CapabilityLength */
out_uint32_le(s, PORT_CAPABILITY_VERSION_01); /* Version */
out_uint16_le(s, CAP_DRIVE_TYPE); /* CapabilityType */
out_uint16_le(s, 8); /* CapabilityLength */
out_uint32_le(s, DRIVE_CAPABILITY_VERSION_02); /* Version */
out_uint16_le(s, CAP_SMARTCARD_TYPE); /* CapabilityType */
out_uint16_le(s, 8); /* CapabilityLength */
out_uint32_le(s, SMARTCARD_CAPABILITY_VERSION_01); /* Version */
s_mark_end(s);
channel_send(s, rdpdr_channel);
}
static void
rdpdr_process(STREAM s)
{
uint32 handle;
uint16 vmin;
uint16 component;
uint16 pakid;
struct stream packet = *s;
logger(Protocol, Debug, "rdpdr_process()");
/* hexdump(s->p, s->end - s->p); */
in_uint16(s, component); /* RDPDR_HEADER.Component */
in_uint16(s, pakid); /* RDPDR_HEADER.PacketId */
if (component == RDPDR_CTYP_CORE)
{
switch (pakid)
{
case PAKID_CORE_DEVICE_IOREQUEST:
rdpdr_process_irp(s);
break;
case PAKID_CORE_SERVER_ANNOUNCE:
/* DR_CORE_SERVER_ANNOUNCE_REQ */
in_uint8s(s, 2); /* skip versionMajor */
in_uint16_le(s, vmin); /* VersionMinor */
in_uint32_le(s, g_client_id); /* ClientID */
/* g_client_id is sent back to server,
so lets check that we actually got
valid data from stream to prevent
that we leak back data to server */
if (!s_check(s))
{
rdp_protocol_error("rdpdr_process(), consume of g_client_id from stream did overrun", &packet);
}
/* The RDP client is responsibility to provide a random client id
if server version is < 12 */
if (vmin < 0x000c)
g_client_id = 0x815ed39d; /* IP address (use 127.0.0.1) 0x815ed39d */
g_epoch++;
#if WITH_SCARD
/*
* We need to release all SCARD contexts to end all
* current transactions and pending calls
*/
scard_release_all_contexts();
/*
* According to [MS-RDPEFS] 3.2.5.1.2:
*
* If this packet appears after a sequence of other packets,
* it is a signal that the server has reconnected to a new session
* and the whole sequence has been reset. The client MUST treat
* this packet as the beginning of a new sequence.
* The client MUST also cancel all outstanding requests and release
* previous references to all devices.
*
* If any problem arises in the future, please, pay attention to the
* "If this packet appears after a sequence of other packets" part
*
*/
#endif
rdpdr_send_client_announce_reply();
rdpdr_send_client_name_request();
break;
case PAKID_CORE_CLIENTID_CONFIRM:
rdpdr_send_client_device_list_announce();
break;
case PAKID_CORE_DEVICE_REPLY:
in_uint32(s, handle);
logger(Protocol, Debug,
"rdpdr_process(), server connected to resource %d", handle);
break;
case PAKID_CORE_SERVER_CAPABILITY:
rdpdr_send_client_capability_response();
break;
default:
logger(Protocol, Debug,
"rdpdr_process(), pakid 0x%x of component 0x%x", pakid,
component);
break;
}
}
else if (component == RDPDR_CTYP_PRN)
{
if (pakid == PAKID_PRN_CACHE_DATA)
printercache_process(s);
}
else
logger(Protocol, Warning, "rdpdr_process(), unhandled component 0x%x", component);
}
RD_BOOL
rdpdr_init()
{
rdpdr_channel =
channel_register("rdpdr",
CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_COMPRESS_RDP,
rdpdr_process);
return (rdpdr_channel != NULL);
}
/* Add file descriptors of pending io request to select() */
void
rdpdr_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv, RD_BOOL * timeout)
{
uint32 select_timeout = 0; /* Timeout value to be used for select() (in milliseconds). */
struct async_iorequest *iorq;
char c;
iorq = g_iorequest;
while (iorq != NULL)
{
if (iorq->fd != 0)
{