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git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@3 423420c4-83ab-492f-b58f-81f9feb106b5
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Matt Chapman 2000-05-10 07:36:34 +00:00
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339
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
675 Mass Ave, Cambridge, MA 02139, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
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Finally, any free program is threatened constantly by software
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program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
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exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
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except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
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license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
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If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
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such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
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address new problems or concerns.
Each version is given a distinguishing version number. If the Program
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either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
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Foundation.
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NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
Appendix: How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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##############################################
# rdesktop: A Remote Desktop Protocol client #
# Linux Makefile #
# Copyright (C) Matthew Chapman 1999-2000 #
##############################################
SOURCES=client.c parse.c tcp.c iso.c mcs.c rdp.c bitmap.c
rdesktop: $(SOURCES)
@gcc -g -Wall -o rdesktop $(SOURCES)

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/*
rdesktop: A Remote Desktop Protocol client.
Bitmap decompression routines
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include <fcntl.h>
#define BITMAP_DEBUG 1
#if BITMAP_DEBUG
void hexdump(char *filename, unsigned char *data, int length);
#endif
#define RCVAL() (*(input++))
#define RSVAL() ((*((input++) + 1) << 8) | RCVAL())
#define SCVAL(v) {*(output++) = (v);}
#define FILL() {while (n-- > 0) { if (output - start < width) { SCVAL(0) } else { SCVAL(*(output-width)); }}}
#define MIX() {while (n-- > 0) { if (output - start < width) { SCVAL(mix) } else { SCVAL(*(output-width) ^ mix); }}}
#define COPY() {while (n-- > 0) { SCVAL(RCVAL()); }}
#define COLOR() {int color = RCVAL(); \
while (n-- > 0) { SCVAL(color); }}
#define BICOLOR() {int color1 = RCVAL(); int color2 = RCVAL(); \
while (n-- > 0) { SCVAL(color1); SCVAL(color2); }}
#define SETMIX_MIX() {mix = RCVAL(); MIX();}
#define COPY_PACKED() {n++; n/=2; while (n-- > 0) \
{unsigned char c = RCVAL(); SCVAL((c & 0xF0) >> 4); \
SCVAL(c & 0x0F); }}
BOOL bitmap_decompress(unsigned char *input, int size,
unsigned char *output, int width)
{
unsigned char *savedinput = input;
unsigned char *start = output;
unsigned char *end = input + size;
unsigned char code;
unsigned char mix = 0xFF;
int n, savedn;
while (input < end)
{
code = RCVAL();
switch (code)
{
case 0x00: // Fill
n = RCVAL() + 32;
FILL();
break;
case 0xF0: // Fill
n = RSVAL();
FILL();
break;
case 0x20: // Mix
n = RCVAL() + 32;
MIX();
break;
case 0xF1: // Mix
n = RSVAL();
MIX();
break;
case 0x40: // FillOrMix
fprintf(stderr, "FillOrMix unsupported\n");
savedn = n = RCVAL() + 1;
MIX();
input += (savedn+7)/8;
break;
case 0xF2:
fprintf(stderr, "FillOrMix unsupported\n");
savedn = n = RSVAL();
MIX();
input += (savedn+7)/8;
break;
case 0x60: // Color
n = RCVAL() + 32;
COLOR();
break;
case 0xF3:
n = RSVAL();
fprintf(stderr, "Color %d\n", n);
COLOR();
break;
case 0x80: // Copy
n = RCVAL() + 32;
COPY();
break;
case 0xF4:
n = RSVAL();
COPY();
break;
case 0xA0: // Copy Packed
fprintf(stderr, "CopyPacked 1\n");
n = RCVAL() + 32;
COPY_PACKED();
break;
case 0xF5:
fprintf(stderr, "CopyPacked 2\n");
n = RSVAL();
COPY_PACKED();
break;
case 0xC0: // SetMix_Mix
fprintf(stderr, "SetMix_Mix 1\n");
n = RCVAL() + 16;
SETMIX_MIX();
break;
case 0xF6:
fprintf(stderr, "SetMix_Mix 2\n");
n = RSVAL();
SETMIX_MIX();
break;
case 0xD0: // SetMix_FillOrMix
fprintf(stderr, "SetMix_FillOrMix unsupported\n");
savedn = n = RCVAL() + 1;
SETMIX_MIX();
input += (savedn+7)/8;
break;
case 0xF7:
fprintf(stderr, "SetMix_FillOrMix unsupported\n");
savedn = n = RSVAL();
SETMIX_MIX();
input += (savedn+7)/8;
break;
case 0xE0: // Bicolor
fprintf(stderr, "Bicolor 1\n");
n = RCVAL() + 16;
BICOLOR();
break;
case 0xF8:
fprintf(stderr, "Bicolor 2\n");
n = RSVAL();
BICOLOR();
break;
case 0xF9: // FillOrMix_1
fprintf(stderr, "FillOrMix_1 unsupported\n");
return False;
case 0xFA: // FillOrMix_2
fprintf(stderr, "FillOrMix_2 unsupported\n");
return False;
case 0xFD: // White
SCVAL(0xFF);
break;
case 0xFE: // Black
SCVAL(0);
break;
default:
n = code & 31;
if (n == 0)
{
fprintf(stderr, "Undefined escape 0x%X\n", code);
return False;
}
switch ((code >> 5) & 7)
{
case 0: // Fill
FILL();
break;
case 1: // Mix
MIX();
break;
case 2: // FillOrMix
fprintf(stderr, "FillOrMix unsupported\n");
n *= 8;
savedn = n;
MIX();
input += (savedn+7)/8;
break;
case 3: // Color
COLOR();
break;
case 4: // Copy
COPY();
break;
case 5: // Copy Packed
fprintf(stderr, "CopyPacked 3\n");
COPY_PACKED();
break;
case 6:
n = code & 15;
switch ((code >> 4) & 15)
{
case 0xC:
fprintf(stderr, "SetMix_Mix 3\n");
SETMIX_MIX();
break;
case 0xD:
fprintf(stderr, "SetMix_FillOrMix unsupported\n");
n *= 8;
savedn = n;
SETMIX_MIX();
input += (savedn+7)/8;
break;
case 0xE:
fprintf(stderr, "Bicolor 3\n");
BICOLOR();
break;
default:
fprintf(stderr, "Undefined escape 0x%X\n", code);
return False;
}
}
}
}
printf("Uncompressed size: %d\n", output - start);
#if BITMAP_DEBUG
{
static int bmpno = 1;
char filename[64];
snprintf(filename, sizeof(filename)-1, "in%d.raw", bmpno);
hexdump(filename, savedinput, size);
snprintf(filename, sizeof(filename)-1, "out%d.raw", bmpno);
hexdump(filename, start, output-start);
bmpno++;
}
#endif
return True;
}
#if BITMAP_DEBUG
void hexdump(char *filename, unsigned char *data, int length)
{
/*
int i;
for (i = 0; i < length; i++)
{
printf("%02X ", data[i]);
if (i % 16 == 15)
printf("\n");
}
*/
int fd;
fd = open(filename, O_WRONLY|O_CREAT, 0600);
write(fd, data, length);
close(fd);
}
#endif

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - ISO layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "signal.h"
int main(int argc, char *argv[])
{
HCONN conn;
fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
fprintf(stderr, "Version 0.9.0-prealpha. Copyright (C) 1999-2000 Matt Chapman.\n\n");
if (argc < 2)
{
fprintf(stderr, "Usage: %s <server>\n", argv[0]);
return 1;
}
if ((conn = rdp_connect(argv[1])) == NULL)
return 1;
fprintf(stderr, "Connection successful.\n");
rdp_disconnect(conn);
return 0;
}
void *xmalloc(int size)
{
void *mem = malloc(size);
if (mem == NULL) {
fprintf(stderr, "xmalloc: Out of memory.\n");
exit(1);
}
return mem;
}
void *xrealloc(void *oldmem, int size)
{
void *mem = realloc(oldmem, size);
if (mem == NULL) {
fprintf(stderr, "xrealloc: Out of memory.\n");
exit(1);
}
return mem;
}

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/*
rdesktop: A Remote Desktop Protocol client.
Global include file
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define False (0)
#define True (1)
typedef int BOOL;
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint32;
#include "parse.h"
#include "tcp.h"
#include "iso.h"
#include "mcs.h"
#include "rdp.h"
#include "proto.h"

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - ISO layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* Establish a connection up to the ISO layer */
HCONN iso_connect(char *server)
{
HCONN conn;
uint8 code;
if ((conn = tcp_connect(server)) == NULL)
return NULL;
iso_send_msg(conn, ISO_PDU_CR);
if (!iso_recv_msg(conn, &code) || (code != ISO_PDU_CC))
{
fprintf(stderr, "ISO error, expected CC\n");
tcp_disconnect(conn);
return NULL;
}
return conn;
}
/* Disconnect from the ISO layer */
void iso_disconnect(HCONN conn)
{
iso_send_msg(conn, ISO_PDU_DR);
tcp_disconnect(conn);
}
/* Send self-contained ISO message identified by code */
BOOL iso_send_msg(HCONN conn, uint8 code)
{
TPKT tpkt;
TPDU tpdu;
iso_make_tpkt(&tpkt, 11);
iso_io_tpkt(&conn->out, &tpkt);
iso_make_tpdu(&tpdu, code);
iso_io_tpdu(&conn->out, &tpdu);
MARK_END(conn->out);
return tcp_send(conn);
}
/* Receive a message on the ISO layer, return code */
BOOL iso_recv_msg(HCONN conn, uint8 *code)
{
TPDU tpdu;
TPKT tpkt;
BOOL res;
res = tcp_recv(conn, 4);
res = res ? iso_io_tpkt(&conn->in, &tpkt) : False;
res = res ? tcp_recv(conn, tpkt.length - 4) : False;
res = res ? iso_io_tpdu(&conn->in, &tpdu) : False;
*code = tpdu.code;
return res;
}
/* Initialise ISO transport data packet */
void iso_init(struct connection *conn)
{
PUSH_LAYER(conn->out, iso_offset, 7);
}
/* Receive ISO transport data packet */
BOOL iso_recv(HCONN conn)
{
uint8 code;
if (!iso_recv_msg(conn, &code) || (code != ISO_PDU_DT))
{
fprintf(stderr, "ISO error, expected DT\n");
return False;
}
return True;
}
/* Receive ISO transport data packet */
BOOL iso_send(HCONN conn)
{
TPKT tpkt;
TPDU tpdu;
POP_LAYER(conn->out, iso_offset);
iso_make_tpkt(&tpkt, conn->out.end);
iso_io_tpkt(&conn->out, &tpkt);
iso_make_tpdu(&tpdu, ISO_PDU_DT);
iso_io_tpdu(&conn->out, &tpdu);
return tcp_send(conn);
}
/* Initialise a TPKT structure */
void iso_make_tpkt(TPKT *tpkt, int length)
{
tpkt->version = 3;
tpkt->reserved = 0;
tpkt->length = length;
}
/* Marshall/demarshall a TPKT structure */
BOOL iso_io_tpkt(STREAM s, TPKT *tpkt)
{
if (!prs_io_uint8(s, &tpkt->version))
return False;
if (tpkt->version != 3)
{
fprintf(stderr, "Wrong TPKT version %d\n", tpkt->version);
return False;
}
if (!prs_io_uint8 (s, &tpkt->reserved))
return False;
if (!msb_io_uint16(s, &tpkt->length))
return False;
return True;
}
/* Initialise a TPDU structure */
void iso_make_tpdu(TPDU *tpdu, uint8 code)
{
tpdu->hlen = (code == ISO_PDU_DT) ? 2 : 6;
tpdu->code = code;
tpdu->dst_ref = tpdu->src_ref = 0;
tpdu->class = 0;
tpdu->eot = 0x80;
}
/* Marshall/demarshall a TPDU structure */
BOOL iso_io_tpdu(STREAM s, TPDU *tpdu)
{
BOOL res = True;
res = res ? prs_io_uint8 (s, &tpdu->hlen) : False;
res = res ? prs_io_uint8 (s, &tpdu->code) : False;
if (tpdu->code == ISO_PDU_DT)
{
res = res ? prs_io_uint8(s, &tpdu->eot) : False;
}
else
{
res = res ? msb_io_uint16(s, &tpdu->dst_ref) : False;
res = res ? msb_io_uint16(s, &tpdu->src_ref) : False;
res = res ? prs_io_uint8 (s, &tpdu->class ) : False;
}
return res;
}

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - ISO layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* ISO PDU codes */
enum ISO_PDU_CODE
{
ISO_PDU_CR = 0xE0, /* Connection Request */
ISO_PDU_CC = 0xD0, /* Connection Confirm */
ISO_PDU_DR = 0x80, /* Disconnect Request */
ISO_PDU_DT = 0xF0, /* Data */
ISO_PDU_ER = 0x70 /* Error */
};
/* ISO transport encapsulation over TCP (RFC2126) */
typedef struct _TPKT
{
uint8 version;
uint8 reserved;
uint16 length;
} TPKT;
/* ISO transport protocol PDU (RFC905) */
typedef struct _TPDU
{
uint8 hlen;
uint8 code;
/* CR, CC, DR PDUs */
uint16 dst_ref;
uint16 src_ref;
uint8 class;
/* DT PDU */
uint8 eot;
} TPDU;

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - Multipoint Communications Service
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* Establish a connection up to the MCS layer */
HCONN mcs_connect(char *server)
{
HCONN conn;
MCS_CONNECT_RESPONSE mcr;
MCS_AUCF aucf;
if ((conn = iso_connect(server)) == NULL)
return NULL;
mcs_send_connect_initial(conn);
if (!iso_recv(conn) || !mcs_io_connect_response(&conn->in, &mcr))
{
fprintf(stderr, "MCS error, expected Connect-Response\n");
iso_disconnect(conn);
return NULL;
}
if (mcr.result != 0)
{
fprintf(stderr, "MCS-Connect-Initial failed, result %d\n",
mcr.result);
iso_disconnect(conn);
return NULL;
}
mcs_send_edrq(conn);
mcs_send_aurq(conn);
if (!iso_recv(conn) || !mcs_io_aucf(&conn->in, &aucf))
{
fprintf(stderr, "MCS error, expected AUcf\n");
mcs_disconnect(conn);
return NULL;
}
if (aucf.result != 0)
{
fprintf(stderr, "AUrq failed, result %d\n", mcr.result);
mcs_disconnect(conn);
return NULL;
}
conn->mcs_userid = aucf.userid;
if (!mcs_join_channel(conn, aucf.userid + 1001)
|| !mcs_join_channel(conn, MCS_GLOBAL_CHANNEL))
{
mcs_disconnect(conn);
return NULL;
}
return conn;
}
BOOL mcs_join_channel(HCONN conn, uint16 chanid)
{
MCS_CJCF cjcf;
mcs_send_cjrq(conn, chanid);
if (!iso_recv(conn) || !mcs_io_cjcf(&conn->in, &cjcf))
{
fprintf(stderr, "MCS error, expected CJcf\n");
return False;
}
if (cjcf.result != 0)
{
fprintf(stderr, "CJrq failed, result %d\n", cjcf.result);
return False;
}
return True;
}
/* Disconnect from the MCS layer */
void mcs_disconnect(HCONN conn)
{
/* Not complete */
iso_disconnect(conn);
}
/* Send a Connect-Initial message */
void mcs_send_connect_initial(HCONN conn)
{
MCS_CONNECT_INITIAL mci;
iso_init(conn);
mcs_make_connect_initial(&mci);
mcs_io_connect_initial(&conn->out, &mci);
MARK_END(conn->out);
iso_send(conn);
}
/* Send a EDrq message */
void mcs_send_edrq(HCONN conn)
{
MCS_EDRQ edrq;
iso_init(conn);
edrq.height = edrq.interval = 1;
mcs_io_edrq(&conn->out, &edrq);
MARK_END(conn->out);
iso_send(conn);
}
/* Send a AUrq message */
void mcs_send_aurq(HCONN conn)
{
MCS_AURQ aurq;
iso_init(conn);
mcs_io_aurq(&conn->out, &aurq);
MARK_END(conn->out);
iso_send(conn);
}
/* Send a CJrq message */
void mcs_send_cjrq(HCONN conn, uint16 chanid)
{
MCS_CJRQ cjrq;
iso_init(conn);
cjrq.userid = conn->mcs_userid;
cjrq.chanid = chanid;
mcs_io_cjrq(&conn->out, &cjrq);
MARK_END(conn->out);
iso_send(conn);
}
/* Initialise MCS transport data packet */
void mcs_init_data(HCONN conn)
{
iso_init(conn);
PUSH_LAYER(conn->out, mcs_offset, 8);
}
/* Transmit MCS transport data packet */
void mcs_send_data(HCONN conn, uint16 chanid, BOOL request)
{
MCS_DATA dt;
POP_LAYER(conn->out, mcs_offset);
dt.userid = conn->mcs_userid;
dt.chanid = chanid;
dt.flags = 0x70;
dt.length = conn->out.end - conn->out.offset - 8;
mcs_io_data(&conn->out, &dt, request);
iso_send(conn);
}
/* Receive a message on the MCS layer */
BOOL mcs_recv(HCONN conn, BOOL request)
{
MCS_DATA data;
return (iso_recv(conn)) && mcs_io_data(&conn->in, &data, request);
}
/* Initialise a DOMAIN_PARAMS structure */
void mcs_make_domain_params(DOMAIN_PARAMS *dp, uint16 max_channels,
uint16 max_users, uint16 max_tokens, uint16 max_pdusize)
{
dp->max_channels = max_channels;
dp->max_users = max_users;
dp->max_tokens = max_tokens;
dp->num_priorities = 1;
dp->min_throughput = 0;
dp->max_height = 1;
dp->max_pdusize = max_pdusize;
dp->ver_protocol = 2;
}
/* RDP-specific 'user data'. Let's just get this right for now - to be
decoded later. */
char precanned_connect_userdata[] = {
0x00,0x05,0x00,0x14,0x7c,0x00,0x01,0x80,0x9e,0x00,0x08,0x00,0x10,0x00,
0x01,0xc0,0x00,0x44,0x75,0x63,0x61,0x80,0x90,0x01,0xc0,0x88,0x00,0x01,
0x00,0x08,0x00,0x80,0x02,0xe0,0x01,0x01,0xca,0x03,0xaa,0x09,0x04,0x00,
0x00,0xa3,0x01,0x00,0x00,0x52,0x00,0x45,0x00,0x53,0x00,0x31,0x00,0x2d,
0x00,0x4e,0x00,0x45,0x00,0x57,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0xca,0x00,0x00,0x02,0xc0,0x08,0x00,0x00,0x00,0x00,0x00 };
/* Initialise a MCS_CONNECT_INITIAL structure */
void mcs_make_connect_initial(MCS_CONNECT_INITIAL *mci)
{
mci->calling_domain.length = 0;
mci->calling_domain.data = NULL;
mci->called_domain.length = 0;
mci->called_domain.data = NULL;
mci->upward_flag = 0xff;
mcs_make_domain_params(&mci->target_params, 2, 2, 0, 0xffff);
mcs_make_domain_params(&mci->minimum_params, 1, 1, 1, 0x420);
mcs_make_domain_params(&mci->maximum_params, 0xffff, 0xfc17, 0xffff,
0xffff);
mci->user_data.length = sizeof(precanned_connect_userdata);
mci->user_data.data = precanned_connect_userdata;
mci->length = 2*2 + 3 + 3*34 + 4 + mci->user_data.length;
}
/* Marshall/demarshall an ASN.1 BER header */
BOOL ber_io_header(STREAM s, BOOL islong, int tagval, int *length)
{
uint16 word_tag;
uint8 byte_tag;
uint16 word_len;
uint8 byte_len;
uint8 byte_int;
int tag;
BOOL res;
/* Read/write tag */
if (islong) {
word_tag = tagval;
res = msb_io_uint16(s, &word_tag);
tag = word_tag;
} else {
byte_tag = tagval;
res = prs_io_uint8(s, &byte_tag);
tag = byte_tag;
}
if (!res || (tag != tagval)) {
fprintf(stderr, "Invalid ASN.1 tag\n");
return False;
}
/* Read/write length */
if (s->marshall)
{
if (*length >= 0x80)
{
byte_len = 0x82;
word_len = (uint16)*length;
res = prs_io_uint8(s, &byte_len);
res = res ? msb_io_uint16(s, &word_len) : False;
}
else
{
byte_len = (uint8)*length;
res = prs_io_uint8(s, &byte_len);
}
}
else
{
if (!prs_io_uint8(s, &byte_len))
return False;
if (byte_len & 0x80)
{
byte_len &= ~0x80;
*length = 0;
while (byte_len--)
{
if (!prs_io_uint8(s, &byte_int))
return False;
*length <<= 8;
*length += byte_int;
}
}
else *length = byte_len;
}
return res;
}
/* Marshall/demarshall an octet string (ASN.1 BER) */
BOOL ber_io_octet_string(STREAM s, OCTET_STRING *os)
{
if (!ber_io_header(s, False, 4, &os->length))
return False;
if (os->length > s->end - s->offset)
return False;
if (s->marshall)
{
memcpy(s->data + s->offset, os->data, os->length);
}
else
{
os->data = malloc(os->length);
memcpy(os->data, s->data + s->offset, os->length);
}
s->offset += os->length;
return True;
}
/* Marshall/demarshall an integer (ASN.1 BER) */
BOOL ber_io_integer(STREAM s, uint16 *word_int)
{
int length = 2;
uint8 byte_int;
BOOL res;
if (!ber_io_header(s, False, 2, &length))
return False;
if (s->marshall)
{
res = msb_io_uint16(s, word_int);
}
else
{
*word_int = 0;
while (length--)
{
if (!prs_io_uint8(s, &byte_int))
return False;
*word_int <<= 8;
*word_int += byte_int;
}
}
return res;
}
/* Marshall/demarshall a simple uint8 type (ASN.1 BER) */
BOOL ber_io_uint8(STREAM s, uint8 *i, int tagval)
{
int length = 1;
if (!ber_io_header(s, False, tagval, &length))
return False;
if (length != 1)
{
fprintf(stderr, "Wrong length for simple type\n");
return False;
}
return prs_io_uint8(s, i);
}
/* Marshall/demarshall a DOMAIN_PARAMS structure (ASN.1 BER) */
BOOL mcs_io_domain_params(STREAM s, DOMAIN_PARAMS *dp)
{
int length = 32;
BOOL res;
res = ber_io_header(s, False, 0x30, &length);
res = res ? ber_io_integer(s, &dp->max_channels ) : False;
res = res ? ber_io_integer(s, &dp->max_users ) : False;
res = res ? ber_io_integer(s, &dp->max_tokens ) : False;
res = res ? ber_io_integer(s, &dp->num_priorities) : False;
res = res ? ber_io_integer(s, &dp->min_throughput) : False;
res = res ? ber_io_integer(s, &dp->max_height ) : False;
res = res ? ber_io_integer(s, &dp->max_pdusize ) : False;
res = res ? ber_io_integer(s, &dp->ver_protocol ) : False;
return res;
}
/* Marshall/demarshall a MCS_CONNECT_INITIAL structure (ASN.1 BER) */
BOOL mcs_io_connect_initial(STREAM s, MCS_CONNECT_INITIAL *mci)
{
BOOL res;
res = ber_io_header(s, True, 0x7f65, &mci->length);
res = res ? ber_io_octet_string (s, &mci->calling_domain) : False;
res = res ? ber_io_octet_string (s, &mci->called_domain ) : False;
res = res ? ber_io_uint8 (s, &mci->upward_flag, 1) : False;
res = res ? mcs_io_domain_params(s, &mci->target_params ) : False;
res = res ? mcs_io_domain_params(s, &mci->minimum_params) : False;
res = res ? mcs_io_domain_params(s, &mci->maximum_params) : False;
res = res ? ber_io_octet_string (s, &mci->user_data ) : False;
return res;
}
/* Marshall/demarshall a MCS_CONNECT_RESPONSE structure (ASN.1 BER) */
BOOL mcs_io_connect_response(STREAM s, MCS_CONNECT_RESPONSE *mcr)
{
BOOL res;
res = ber_io_header(s, True, 0x7f66, &mcr->length);
res = res ? ber_io_uint8 (s, &mcr->result, 10 ) : False;
res = res ? ber_io_integer (s, &mcr->connect_id ) : False;
res = res ? mcs_io_domain_params(s, &mcr->domain_params) : False;
res = res ? ber_io_octet_string (s, &mcr->user_data ) : False;
return res;
}
/* Marshall/demarshall an EDrq structure (ASN.1 PER) */
BOOL mcs_io_edrq(STREAM s, MCS_EDRQ *edrq)
{
uint8 opcode = (1) << 2;
uint8 pkt_opcode = opcode;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if (pkt_opcode != opcode)
{
fprintf(stderr, "Expected EDrq, received %x\n", pkt_opcode);
return False;
}
res = res ? msb_io_uint16(s, &edrq->height ) : False;
res = res ? msb_io_uint16(s, &edrq->interval) : False;
return res;
}
/* Marshall/demarshall an AUrq structure (ASN.1 PER) */
BOOL mcs_io_aurq(STREAM s, MCS_AURQ *aurq)
{
uint8 opcode = (10) << 2;
uint8 pkt_opcode = opcode;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if (pkt_opcode != opcode)
{
fprintf(stderr, "Expected AUrq, received %x\n", pkt_opcode);
return False;
}
return res;
}
/* Marshall/demarshall an AUcf structure (ASN.1 PER) */
BOOL mcs_io_aucf(STREAM s, MCS_AUCF *aucf)
{
uint8 opcode = (11) << 2;
uint8 pkt_opcode = opcode | 2;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if ((pkt_opcode & 0xfc) != opcode)
{
fprintf(stderr, "Expected AUcf, received %x\n", pkt_opcode);
return False;
}
res = res ? prs_io_uint8 (s, &aucf->result) : False;
if (pkt_opcode & 2)
res = res ? msb_io_uint16(s, &aucf->userid) : False;
return res;
}
/* Marshall/demarshall an CJrq structure (ASN.1 PER) */
BOOL mcs_io_cjrq(STREAM s, MCS_CJRQ *cjrq)
{
uint8 opcode = (14) << 2;
uint8 pkt_opcode = opcode;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if (pkt_opcode != opcode)
{
fprintf(stderr, "Expected CJrq, received %x\n", pkt_opcode);
return False;
}
res = res ? msb_io_uint16(s, &cjrq->userid) : False;
res = res ? msb_io_uint16(s, &cjrq->chanid) : False;
return res;
}
/* Marshall/demarshall an CJcf structure (ASN.1 PER) */
BOOL mcs_io_cjcf(STREAM s, MCS_CJCF *cjcf)
{
uint8 opcode = (15) << 2;
uint8 pkt_opcode = opcode | 2;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if ((pkt_opcode & 0xfc) != opcode)
{
fprintf(stderr, "Expected CJcf, received %x\n", pkt_opcode);
return False;
}
res = res ? prs_io_uint8 (s, &cjcf->result) : False;
res = res ? msb_io_uint16(s, &cjcf->userid) : False;
res = res ? msb_io_uint16(s, &cjcf->req_chanid) : False;
if (pkt_opcode & 2)
res = res ? msb_io_uint16(s, &cjcf->join_chanid) : False;
return res;
}
/* Marshall/demarshall an SDrq or SDin packet (ASN.1 PER) */
BOOL mcs_io_data(STREAM s, MCS_DATA *dt, BOOL request)
{
uint8 opcode = (request ? 25 : 26) << 2;
uint8 pkt_opcode = opcode;
BOOL res;
res = prs_io_uint8(s, &pkt_opcode);
if (pkt_opcode != opcode)
{
fprintf(stderr, "Expected MCS data, received %x\n", pkt_opcode);
return False;
}
dt->length |= 0x8000;
res = res ? msb_io_uint16(s, &dt->userid) : False;
res = res ? msb_io_uint16(s, &dt->chanid) : False;
res = res ? prs_io_uint8 (s, &dt->flags ) : False;
res = res ? msb_io_uint16(s, &dt->length) : False;
return res;
}

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - Multipoint Communications Service
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* An ASN.1 octet string */
typedef struct _OCTET_STRING
{
int length;
unsigned char *data;
} OCTET_STRING;
/* MCS domain parameters */
typedef struct _DOMAIN_PARAMS
{
uint16 max_channels;
uint16 max_users;
uint16 max_tokens;
uint16 num_priorities;
uint16 min_throughput;
uint16 max_height;
uint16 max_pdusize;
uint16 ver_protocol;
} DOMAIN_PARAMS;
/* MCS-CONNECT-INITIAL request */
typedef struct _MCS_CONNECT_INITIAL
{
int length;
OCTET_STRING calling_domain;
OCTET_STRING called_domain;
uint8 upward_flag;
DOMAIN_PARAMS target_params;
DOMAIN_PARAMS minimum_params;
DOMAIN_PARAMS maximum_params;
OCTET_STRING user_data;
} MCS_CONNECT_INITIAL;
/* MCS-CONNECT-RESPONSE */
typedef struct _MCS_CONNECT_RESPONSE
{
int length;
uint8 result;
uint16 connect_id;
DOMAIN_PARAMS domain_params;
OCTET_STRING user_data;
} MCS_CONNECT_RESPONSE;
/* EDrq - Erect Domain Request */
typedef struct _MCS_EDRQ
{
uint16 height;
uint16 interval;
} MCS_EDRQ;
/* AUrq - Attach User Request */
typedef struct _MCS_AURQ
{
} MCS_AURQ;
/* AUcf - Attach User Confirm */
typedef struct _MCS_AUCF
{
uint8 result;
uint16 userid;
} MCS_AUCF;
/* CJrq - Channel Join Request */
typedef struct _MCS_CJRQ
{
uint16 userid;
uint16 chanid;
} MCS_CJRQ;
/* CJcf - Channel Join Confirm */
typedef struct _MCS_CJCF
{
uint8 result;
uint16 userid;
uint16 req_chanid;
uint16 join_chanid;
} MCS_CJCF;
/* SDrq/SDin - Send Data */
typedef struct _MCS_DATA
{
uint16 userid;
uint16 chanid;
uint8 flags;
uint16 length;
} MCS_DATA;
#define MCS_GLOBAL_CHANNEL 1003

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - parsing layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* Parse a 8-bit integer */
BOOL prs_io_uint8(STREAM s, uint8 *i)
{
if (s->offset + 1 > s->end)
{
fprintf(stderr, "Parse past end of buffer\n");
return False;
}
if (s->marshall)
s->data[s->offset] = *i;
else
*i = s->data[s->offset];
s->offset++;
return True;
}
/* Parse a sequence of 8-bit integers */
BOOL prs_io_uint8s(STREAM s, uint8 *p, unsigned int length)
{
if (s->offset + length > s->end)
{
fprintf(stderr, "Parse past end of buffer\n");
return False;
}
if (s->marshall)
memcpy(s->data + s->offset, p, length);
else
memcpy(p, s->data + s->offset, length);
s->offset += length;
return True;
}
/* Parse a 16-bit integer, most significant bytes first */
BOOL msb_io_uint16(STREAM s, uint16 *i)
{
int offset = s->offset;
if (offset + 2 > s->end)
{
fprintf(stderr, "Parse past end of buffer\n");
return False;
}
if (s->marshall) {
s->data[offset] = (uint8)(*i >> 8);
s->data[offset+1] = (uint8)(*i);
} else {
*i = (s->data[offset] << 8) + (s->data[offset+1]);
}
s->offset+=2;
return True;
}
/* Parse a 16-bit integer, least significant bytes first */
BOOL lsb_io_uint16(STREAM s, uint16 *i)
{
int offset = s->offset;
if (offset + 2 > s->end)
{
fprintf(stderr, "Parse past end of buffer\n");
return False;
}
if (s->marshall) {
s->data[offset] = (uint8)(*i);
s->data[offset+1] = (uint8)(*i >> 8);
} else {
*i = (s->data[offset]) + (s->data[offset+1] << 8);
}
s->offset += 2;
return True;
}
/* Parse a 32-bit integer, least significant bytes first */
BOOL lsb_io_uint32(STREAM s, uint32 *i)
{
int offset = s->offset;
if (offset + 4 > s->end)
{
fprintf(stderr, "Parse past end of buffer\n");
return False;
}
if (s->marshall) {
s->data[offset] = (uint8)(*i);
s->data[offset+1] = (uint8)(*i >> 8);
s->data[offset+2] = (uint8)(*i >> 16);
s->data[offset+3] = (uint8)(*i >> 24);
} else {
*i = (s->data[offset]) + (s->data[offset+1] << 8)
+ (s->data[offset+2] << 16) + (s->data[offset+3] << 24);
}
s->offset += 4;
return True;
}

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - parsing layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Parser state */
typedef struct stream
{
/* Parsing layer */
unsigned char *data;
unsigned int size;
unsigned int offset;
unsigned int end;
BOOL marshall;
BOOL error;
/* Other layers */
int iso_offset;
int mcs_offset;
int rdp_offset;
} *STREAM;
/* Connection state */
typedef struct connection
{
/* Parsing layer */
struct stream in;
struct stream out;
/* TCP layer */
int tcp_socket;
/* MCS layer */
uint16 mcs_userid;
} *HCONN;
#define STREAM_INIT(s,m) { s.data = xmalloc(2048); s.end = s.size = 2048; s.offset = 0; s.marshall = m; s.error = False; }
#define STREAM_SIZE(s,l) { if (l > s.size) { s.data = xrealloc(s.data,l); s.end = s.size = l; } }
#define REMAINING(s) ( s->end - s->offset )
#define PUSH_LAYER(s,v,l) { s.v = s.offset; s.offset += l; }
#define POP_LAYER(s,v) { s.offset = s.v; }
#define MARK_END(s) { s.end = s.offset; }

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/*
rdesktop: A Remote Desktop Protocol client.
Function prototypes
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Parsing layer */
BOOL prs_io_uint8(STREAM s, uint8 *i);
BOOL prs_io_uint8s(STREAM s, uint8 *p, unsigned int length);
BOOL msb_io_uint16(STREAM s, uint16 *i);
BOOL lsb_io_uint16(STREAM s, uint16 *i);
BOOL lsb_io_uint32(STREAM s, uint32 *i);
/* TCP layer */
HCONN tcp_connect(char *server);
void tcp_disconnect(HCONN conn);
BOOL tcp_send(HCONN conn);
BOOL tcp_recv(HCONN conn, int length);
/* ISO layer */
HCONN iso_connect(char *server);
void iso_disconnect(HCONN conn);
BOOL iso_send_msg(HCONN conn, uint8 code);
BOOL iso_recv_msg(HCONN conn, uint8 *code);
void iso_init(struct connection *conn);
BOOL iso_send(HCONN conn);
BOOL iso_recv(HCONN conn);
void iso_make_tpkt(TPKT *tpkt, int length);
BOOL iso_io_tpkt(STREAM s, TPKT *tpkt);
void iso_make_tpdu(TPDU *tpdu, uint8 code);
BOOL iso_io_tpdu(STREAM s, TPDU *tpdu);
/* MCS layer */
HCONN mcs_connect(char *server);
BOOL mcs_join_channel(HCONN conn, uint16 chanid);
void mcs_disconnect(HCONN conn);
void mcs_send_connect_initial(HCONN conn);
void mcs_send_edrq(HCONN conn);
void mcs_send_aurq(HCONN conn);
void mcs_send_cjrq(HCONN conn, uint16 chanid);
void mcs_init_data(HCONN conn);
void mcs_send_data(HCONN conn, uint16 chanid, BOOL request);
int mcs_recv(HCONN conn, BOOL request);
void mcs_make_domain_params(DOMAIN_PARAMS *dp, uint16 max_channels,
uint16 max_users, uint16 max_tokens, uint16 max_pdusize);
void mcs_make_connect_initial(MCS_CONNECT_INITIAL *mci);
BOOL ber_io_header(STREAM s, BOOL islong, int tagval, int *length);
BOOL ber_io_octet_string(STREAM s, OCTET_STRING *os);
BOOL ber_io_integer(STREAM s, uint16 *i);
BOOL ber_io_uint8(STREAM s, uint8 *i, int tagval);
BOOL mcs_io_domain_params(STREAM s, DOMAIN_PARAMS *dp);
BOOL mcs_io_connect_initial(STREAM s, MCS_CONNECT_INITIAL *mci);
BOOL mcs_io_connect_response(STREAM s, MCS_CONNECT_RESPONSE *mcr);
BOOL mcs_io_edrq(STREAM s, MCS_EDRQ *edrq);
BOOL mcs_io_aurq(STREAM s, MCS_AURQ *aurq);
BOOL mcs_io_aucf(STREAM s, MCS_AUCF *aucf);
BOOL mcs_io_cjrq(STREAM s, MCS_CJRQ *cjrq);
BOOL mcs_io_cjcf(STREAM s, MCS_CJCF *cjcf);
BOOL mcs_io_data(STREAM s, MCS_DATA *dt, BOOL request);
/* RDP layer */
HCONN rdp_connect(char *server);
void process_orders(HCONN conn, RDP_ORDER_STATE *os);
void rdp_establish_key(HCONN conn);
void rdp_send_cert(HCONN conn);
void rdp_send_confirm_active(HCONN conn);
void rdp_send_control(HCONN conn, uint16 action);
void rdp_send_synchronize(HCONN conn);
void rdp_send_fonts(HCONN conn, uint16 seqno);
void rdp_send_input(HCONN conn);
BOOL rdp_recv_pdu(HCONN conn, uint8 *type);
void rdp_disconnect(HCONN conn);
void rdp_make_header(RDP_HEADER *hdr, uint16 length, uint16 pdu_type,
uint16 userid);
void rdp_make_data_header(RDP_DATA_HEADER *hdr, uint32 shareid,
uint16 length, uint16 data_pdu_type);
void rdp_make_general_caps(RDP_GENERAL_CAPS *caps);
void rdp_make_bitmap_caps(RDP_BITMAP_CAPS *caps);
void rdp_make_order_caps(RDP_ORDER_CAPS *caps);
void rdp_make_bmpcache_caps(RDP_BMPCACHE_CAPS *caps);
void rdp_make_control_caps(RDP_CONTROL_CAPS *caps);
void rdp_make_activate_caps(RDP_ACTIVATE_CAPS *caps);
void rdp_make_pointer_caps(RDP_POINTER_CAPS *caps);
void rdp_make_share_caps(RDP_SHARE_CAPS *caps, uint16 userid);
void rdp_make_colcache_caps(RDP_COLCACHE_CAPS *caps);
void rdp_make_active_pdu(RDP_ACTIVE_PDU *pdu, uint32 shareid, uint16 userid);
void rdp_make_control_pdu(RDP_CONTROL_PDU *pdu, uint16 action);
void rdp_make_synchronize_pdu(RDP_SYNCHRONIZE_PDU *pdu, uint16 userid);
void rdp_make_font_pdu(RDP_FONT_PDU *pdu, uint16 seqno);
void rdp_make_input_pdu(RDP_INPUT_PDU *pdu);
BOOL rdp_io_header(STREAM s, RDP_HEADER *hdr);
BOOL rdp_io_data_header(STREAM s, RDP_DATA_HEADER *hdr);
BOOL rdp_io_general_caps(STREAM s, RDP_GENERAL_CAPS *caps);
BOOL rdp_io_bitmap_caps(STREAM s, RDP_BITMAP_CAPS *caps);
BOOL rdp_io_order_caps(STREAM s, RDP_ORDER_CAPS *caps);
BOOL rdp_io_bmpcache_info(STREAM s, RDP_BMPCACHE_INFO *info);
BOOL rdp_io_bmpcache_caps(STREAM s, RDP_BMPCACHE_CAPS *caps);
BOOL rdp_io_control_caps(STREAM s, RDP_CONTROL_CAPS *caps);
BOOL rdp_io_activate_caps(STREAM s, RDP_ACTIVATE_CAPS *caps);
BOOL rdp_io_pointer_caps(STREAM s, RDP_POINTER_CAPS *caps);
BOOL rdp_io_share_caps(STREAM s, RDP_SHARE_CAPS *caps);
BOOL rdp_io_colcache_caps(STREAM s, RDP_COLCACHE_CAPS *caps);
BOOL rdp_io_active_pdu(STREAM s, RDP_ACTIVE_PDU *pdu, int pdutype);
BOOL rdp_io_control_pdu(STREAM s, RDP_CONTROL_PDU *pdu);
BOOL rdp_io_synchronize_pdu(STREAM s, RDP_SYNCHRONIZE_PDU *pdu);
BOOL rdp_io_input_event(STREAM s, RDP_INPUT_EVENT *evt);
BOOL rdp_io_input_pdu(STREAM s, RDP_INPUT_PDU *pdu);
BOOL rdp_io_font_info(STREAM s, RDP_FONT_INFO *font);
BOOL rdp_io_font_pdu(STREAM s, RDP_FONT_PDU *pdu);
BOOL rdp_io_update_pdu(STREAM s, RDP_UPDATE_PDU *pdu);
BOOL rdp_io_secondary_order(STREAM s, RDP_SECONDARY_ORDER *rso);
BOOL rdp_io_bitmap_header(STREAM s, RDP_BITMAP_HEADER *rdh);
/* Utility routines */
void *xmalloc(int size);
void *xrealloc(void *oldmem, int size);
BOOL bitmap_decompress(unsigned char *input, int size,
unsigned char *output, int width);

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - RDP layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
enum RDP_PDU_TYPE
{
RDP_PDU_DEMAND_ACTIVE = 1,
RDP_PDU_CONFIRM_ACTIVE = 3,
RDP_PDU_DATA = 7
};
enum RDP_DATA_PDU_TYPE
{
RDP_DATA_PDU_UPDATE = 2,
RDP_DATA_PDU_CONTROL = 20,
RDP_DATA_PDU_POINTER = 27,
RDP_DATA_PDU_INPUT = 28,
RDP_DATA_PDU_SYNCHRONIZE = 31,
RDP_DATA_PDU_FONT2 = 39
};
typedef struct _RDP_HEADER
{
uint16 length;
uint16 pdu_type;
uint16 userid;
} RDP_HEADER;
typedef struct _RDP_DATA_HEADER
{
uint32 shareid;
uint8 pad;
uint8 streamid;
uint16 length;
uint8 data_pdu_type;
uint8 compress_type;
uint16 compress_len;
} RDP_DATA_HEADER;
#define RDP_CAPSET_GENERAL 1
#define RDP_CAPLEN_GENERAL 0x18
#define OS_MAJOR_TYPE_UNIX 4
#define OS_MINOR_TYPE_XSERVER 7
typedef struct _RDP_GENERAL_CAPS
{
uint16 os_major_type;
uint16 os_minor_type;
uint16 ver_protocol;
uint16 pad1;
uint16 compress_types;
uint16 pad2;
uint16 cap_update;
uint16 remote_unshare;
uint16 compress_level;
uint16 pad3;
} RDP_GENERAL_CAPS;
#define RDP_CAPSET_BITMAP 2
#define RDP_CAPLEN_BITMAP 0x1C
typedef struct _RDP_BITMAP_CAPS
{
uint16 preferred_bpp;
uint16 receive1bpp;
uint16 receive4bpp;
uint16 receive8bpp;
uint16 width;
uint16 height;
uint16 pad1;
uint16 allow_resize;
uint16 compression;
uint16 unknown1;
uint16 unknown2;
uint16 pad2;
} RDP_BITMAP_CAPS;
#define RDP_CAPSET_ORDER 3
#define RDP_CAPLEN_ORDER 0x58
#define ORDER_CAP_NEGOTIATE 2
#define ORDER_CAP_NOSUPPORT 4
typedef struct _RDP_ORDER_CAPS
{
uint8 terminal_desc[16];
uint32 pad1;
uint16 xgranularity; // 1
uint16 ygranularity; // 20
uint16 pad2;
uint16 max_order_level;
uint16 num_fonts; // 0x2C
uint16 cap_flags; // 0x22
uint8 support[32];
uint16 text_cap_flags; // 0x6A1
uint16 pad3;
uint32 pad4;
uint32 desk_save_size;
uint32 unknown1; // 1 from server, 0 from client
uint32 unknown2; // 0x4E4 from client
} RDP_ORDER_CAPS;
#define RDP_CAPSET_BMPCACHE 4
#define RDP_CAPLEN_BMPCACHE 0x28
typedef struct _RDP_BMPCACHE_INFO
{
uint16 entries;
uint16 max_cell_size;
} RDP_BMPCACHE_INFO;
typedef struct _RDP_BMPCACHE_CAPS
{
uint32 unused[6];
RDP_BMPCACHE_INFO caches[3];
} RDP_BMPCACHE_CAPS;
#define RDP_CAPSET_CONTROL 5
#define RDP_CAPLEN_CONTROL 0x0C
typedef struct _RDP_CONTROL_CAPS
{
uint16 control_caps;
uint16 remote_detach;
uint16 control_interest;
uint16 detach_interest;
} RDP_CONTROL_CAPS;
#define RDP_CAPSET_ACTIVATE 7
#define RDP_CAPLEN_ACTIVATE 0x0C
typedef struct _RDP_ACTIVATE_CAPS
{
uint16 help_key;
uint16 help_index_key;
uint16 help_extended_key;
uint16 window_activate;
} RDP_ACTIVATE_CAPS;
#define RDP_CAPSET_POINTER 8
#define RDP_CAPLEN_POINTER 0x08
typedef struct _RDP_POINTER_CAPS
{
uint16 colour_pointer;
uint16 cache_size;
} RDP_POINTER_CAPS;
#define RDP_CAPSET_SHARE 9
#define RDP_CAPLEN_SHARE 0x08
typedef struct _RDP_SHARE_CAPS
{
uint16 userid;
uint16 pad;
} RDP_SHARE_CAPS;
#define RDP_CAPSET_COLCACHE 10
#define RDP_CAPLEN_COLCACHE 0x08
typedef struct _RDP_COLCACHE_CAPS
{
uint16 cache_size;
uint16 pad;
} RDP_COLCACHE_CAPS;
#define RDP_CAPSET_UNKNOWN 13
#define RDP_CAPLEN_UNKNOWN 0x9C
#define RDP_SOURCE "MSTSC"
typedef struct _RDP_ACTIVE_PDU
{
uint32 shareid;
uint16 userid; // RDP_PDU_CONFIRM_ACTIVE only
uint16 source_len;
uint16 caps_len;
uint8 source[48];
uint16 num_caps;
uint16 pad;
RDP_GENERAL_CAPS general_caps;
RDP_BITMAP_CAPS bitmap_caps;
RDP_ORDER_CAPS order_caps;
RDP_BMPCACHE_CAPS bmpcache_caps;
RDP_ACTIVATE_CAPS activate_caps;
RDP_CONTROL_CAPS control_caps;
RDP_POINTER_CAPS pointer_caps;
RDP_SHARE_CAPS share_caps;
RDP_COLCACHE_CAPS colcache_caps;
} RDP_ACTIVE_PDU;
typedef struct _RDP_SYNCHRONIZE_PDU
{
uint16 type; // 1
uint16 userid;
} RDP_SYNCHRONIZE_PDU;
#define RDP_CTL_REQUEST_CONTROL 1
#define RDP_CTL_GRANT_CONTROL 2
#define RDP_CTL_DETACH 3
#define RDP_CTL_COOPERATE 4
typedef struct _RDP_CONTROL_PDU
{
uint16 action; // see above
uint16 userid;
uint32 controlid;
} RDP_CONTROL_PDU;
#define RDP_INPUT_SYNCHRONIZE 0
#define RDP_INPUT_CODEPOINT 1
#define RDP_INPUT_VIRTKEY 2
#define RDP_INPUT_UNKNOWN 4
#define RDP_INPUT_MOUSE 0x8001
#define KBD_FLAG_RIGHT 0x0001
#define KBD_FLAG_QUIET 0x1000
#define KBD_FLAG_DOWN 0x4000
#define KBD_FLAG_RELEASE 0x8000
#define MOUSE_FLAG_MOVE 0x0800
#define MOUSE_FLAG_BUTTON1 0x1000
#define MOUSE_FLAG_BUTTON2 0x2000
#define MOUSE_FLAG_BUTTON3 0x4000
#define MOUSE_FLAG_DOWN 0x8000
#define RDP_MAX_EVENTS 50
typedef struct _RDP_INPUT_EVENT
{
uint32 event_time;
uint16 message_type;
uint16 device_flags;
uint16 kbd_keycode;
uint16 mouse_x;
uint16 mouse_y;
} RDP_INPUT_EVENT;
typedef struct _RDP_INPUT_PDU
{
uint16 num_events;
uint16 pad;
RDP_INPUT_EVENT event[RDP_MAX_EVENTS];
} RDP_INPUT_PDU;
#define RDP_FONT_INFO_SIZE 0x32
#define RDP_MAX_FONTS 100
typedef struct _RDP_FONT_INFO
{
uint8 name[32];
uint16 flags;
uint16 width;
uint16 height;
uint16 xaspect;
uint16 yaspect;
uint32 signature;
uint16 codepage;
uint16 ascent;
} RDP_FONT_INFO;
typedef struct _RDP_FONT_PDU
{
uint16 num_fonts;
uint16 unknown1; // 0x3e
uint16 unknown2; // series number?
uint16 entry_size;
RDP_FONT_INFO font[RDP_MAX_FONTS];
} RDP_FONT_PDU;
#define RDP_UPDATE_ORDERS 0
#define RDP_UPDATE_PALETTE 2
typedef struct _OPAQUE_RECT_ORDER
{
uint16 x;
uint16 y;
uint16 cx;
uint16 cy;
uint8 colour;
} OPAQUE_RECT_ORDER;
typedef struct _RDP_ORDER_STATE
{
uint8 order_type;
OPAQUE_RECT_ORDER opaque_rect;
} RDP_ORDER_STATE;
typedef struct _RDP_UPDATE_PDU
{
uint16 update_type;
uint16 pad;
} RDP_UPDATE_PDU;
#define RDP_ORDER_STANDARD 1
#define RDP_ORDER_SECONDARY 2
#define RDP_ORDER_BOUNDS 4
#define RDP_ORDER_CHANGE 8
#define RDP_ORDER_DELTA 16
#define RDP_ORDER_REPEAT 64
enum RDP_ORDER_TYPE
{
RDP_ORDER_OPAQUE_RECT = 10
};
enum RDP_SECONDARY_ORDER_TYPE
{
RDP_ORDER_BMPCACHE = 2
};
typedef struct _RDP_SECONDARY_ORDER
{
uint16 length;
uint16 flags;
uint8 type;
} RDP_SECONDARY_ORDER;
typedef struct _RDP_BITMAP_HEADER
{
uint8 cache_id;
uint8 pad1;
uint8 width;
uint8 height;
uint8 bpp;
uint16 bufsize;
uint16 cache_idx;
uint16 pad2;
uint16 size;
uint16 row_size;
uint16 final_size;
} RDP_BITMAP_HEADER;

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/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - TCP layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* Establish a connection on the TCP layer */
HCONN tcp_connect(char *server)
{
struct hostent *nslookup;
struct sockaddr_in servaddr;
struct connection *conn;
int sock;
int true = 1;
if ((nslookup = gethostbyname(server)) != NULL)
{
memcpy(&servaddr.sin_addr, nslookup->h_addr, sizeof(servaddr.sin_addr));
}
else if (!inet_aton(server, &servaddr.sin_addr))
{
fprintf(stderr, "%s: unable to resolve host\n", server);
return NULL;
}
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
fprintf(stderr, "socket: %s\n", strerror(errno));
return NULL;
}
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(TCP_PORT_RDP);
if (connect(sock, (struct sockaddr *)&servaddr, sizeof(struct sockaddr)) < 0)
{
fprintf(stderr, "connect: %s\n", strerror(errno));
close(sock);
return NULL;
}
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &true, sizeof(true));
conn = xmalloc(sizeof(struct connection));
STREAM_INIT(conn->in, False);
STREAM_INIT(conn->out, True);
conn->tcp_socket = sock;
return conn;
}
/* Disconnect on the TCP layer */
void tcp_disconnect(HCONN conn)
{
close(conn->tcp_socket);
free(conn);
}
/* Send TCP transport data packet */
BOOL tcp_send(HCONN conn)
{
int length = conn->out.end;
int sent, total = 0;
while (total < length)
{
sent = write(conn->tcp_socket, conn->out.data + total,
length - total);
if (sent <= 0)
{
fprintf(stderr, "write: %s\n", strerror(errno));
return False;
}
total += sent;
}
conn->out.offset = 0;
conn->out.end = conn->out.size;
return True;
}
/* Receive a message on the TCP layer */
BOOL tcp_recv(HCONN conn, int length)
{
int rcvd;
STREAM_SIZE(conn->in, length);
conn->in.end = conn->in.offset = 0;
while (length > 0)
{
rcvd = read(conn->tcp_socket, conn->in.data + conn->in.end,
length);
if (rcvd <= 0)
{
fprintf(stderr, "read: %s\n", strerror(errno));
return False;
}
conn->in.end += rcvd;
length -= rcvd;
}
return True;
}

22
tcp.h Normal file
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@ -0,0 +1,22 @@
/*
rdesktop: A Remote Desktop Protocol client.
Protocol services - TCP layer
Copyright (C) Matthew Chapman 1999-2000
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Port number for Remote Desktop Protocol */
#define TCP_PORT_RDP 3389