1 |
/* |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
3 |
Protocol services - Multipoint Communications Service |
Protocol services - Multipoint Communications Service |
4 |
Copyright (C) Matthew Chapman 1999-2000 |
Copyright (C) Matthew Chapman 1999-2007 |
5 |
|
|
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
7 |
it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
8 |
the Free Software Foundation; either version 2 of the License, or |
the Free Software Foundation; either version 2 of the License, or |
9 |
(at your option) any later version. |
(at your option) any later version. |
10 |
|
|
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This program is distributed in the hope that it will be useful, |
This program is distributed in the hope that it will be useful, |
12 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
GNU General Public License for more details. |
GNU General Public License for more details. |
15 |
|
|
16 |
You should have received a copy of the GNU General Public License |
You should have received a copy of the GNU General Public License |
17 |
along with this program; if not, write to the Free Software |
along with this program; if not, write to the Free Software |
18 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
|
|
21 |
#include "rdesktop.h" |
#include "rdesktop.h" |
22 |
|
|
23 |
uint16 mcs_userid; |
uint16 g_mcs_userid; |
24 |
|
extern VCHANNEL g_channels[]; |
25 |
|
extern unsigned int g_num_channels; |
26 |
|
|
27 |
/* Parse an ASN.1 BER header */ |
/* Parse an ASN.1 BER header */ |
28 |
static BOOL ber_parse_header(STREAM s, int tagval, int *length) |
static BOOL |
29 |
|
ber_parse_header(STREAM s, int tagval, int *length) |
30 |
{ |
{ |
31 |
int tag, len; |
int tag, len; |
32 |
|
|
40 |
|
|
41 |
if (tag != tagval) |
if (tag != tagval) |
42 |
{ |
{ |
43 |
ERROR("expected tag %d, got %d\n", tagval, tag); |
error("expected tag %d, got %d\n", tagval, tag); |
44 |
return False; |
return False; |
45 |
} |
} |
46 |
|
|
60 |
} |
} |
61 |
|
|
62 |
/* Output an ASN.1 BER header */ |
/* Output an ASN.1 BER header */ |
63 |
static void ber_out_header(STREAM s, int tagval, int length) |
static void |
64 |
|
ber_out_header(STREAM s, int tagval, int length) |
65 |
{ |
{ |
66 |
if (tagval > 0xff) |
if (tagval > 0xff) |
67 |
{ |
{ |
82 |
} |
} |
83 |
|
|
84 |
/* Output an ASN.1 BER integer */ |
/* Output an ASN.1 BER integer */ |
85 |
static void ber_out_integer(STREAM s, int value) |
static void |
86 |
|
ber_out_integer(STREAM s, int value) |
87 |
{ |
{ |
88 |
ber_out_header(s, BER_TAG_INTEGER, 2); |
ber_out_header(s, BER_TAG_INTEGER, 2); |
89 |
out_uint16_be(s, value); |
out_uint16_be(s, value); |
90 |
} |
} |
91 |
|
|
92 |
/* Output a DOMAIN_PARAMS structure (ASN.1 BER) */ |
/* Output a DOMAIN_PARAMS structure (ASN.1 BER) */ |
93 |
static void mcs_out_domain_params(STREAM s, int max_channels, int max_users, |
static void |
94 |
int max_tokens, int max_pdusize) |
mcs_out_domain_params(STREAM s, int max_channels, int max_users, int max_tokens, int max_pdusize) |
95 |
{ |
{ |
96 |
ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 32); |
ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 32); |
97 |
ber_out_integer(s, max_channels); |
ber_out_integer(s, max_channels); |
105 |
} |
} |
106 |
|
|
107 |
/* Parse a DOMAIN_PARAMS structure (ASN.1 BER) */ |
/* Parse a DOMAIN_PARAMS structure (ASN.1 BER) */ |
108 |
static BOOL mcs_parse_domain_params(STREAM s) |
static BOOL |
109 |
|
mcs_parse_domain_params(STREAM s) |
110 |
{ |
{ |
111 |
int length; |
int length; |
112 |
|
|
117 |
} |
} |
118 |
|
|
119 |
/* Send an MCS_CONNECT_INITIAL message (ASN.1 BER) */ |
/* Send an MCS_CONNECT_INITIAL message (ASN.1 BER) */ |
120 |
static void mcs_send_connect_initial(STREAM mcs_data) |
static void |
121 |
|
mcs_send_connect_initial(STREAM mcs_data) |
122 |
{ |
{ |
123 |
int datalen = mcs_data->end - mcs_data->data; |
int datalen = mcs_data->end - mcs_data->data; |
124 |
int length = 7 + 3 * 34 + 4 + datalen; |
int length = 9 + 3 * 34 + 4 + datalen; |
125 |
STREAM s; |
STREAM s; |
126 |
|
|
127 |
s = iso_init(length + 5); |
s = iso_init(length + 5); |
128 |
|
|
129 |
ber_out_header(s, MCS_CONNECT_INITIAL, length); |
ber_out_header(s, MCS_CONNECT_INITIAL, length); |
130 |
ber_out_header(s, BER_TAG_OCTET_STRING, 0); /* calling domain */ |
ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* calling domain */ |
131 |
ber_out_header(s, BER_TAG_OCTET_STRING, 0); /* called domain */ |
out_uint8(s, 1); |
132 |
|
ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* called domain */ |
133 |
|
out_uint8(s, 1); |
134 |
|
|
135 |
ber_out_header(s, BER_TAG_BOOLEAN, 1); |
ber_out_header(s, BER_TAG_BOOLEAN, 1); |
136 |
out_uint8(s, 0xff); /* upward flag */ |
out_uint8(s, 0xff); /* upward flag */ |
137 |
|
|
138 |
mcs_out_domain_params(s, 2, 2, 0, 0xffff); /* target params */ |
mcs_out_domain_params(s, 34, 2, 0, 0xffff); /* target params */ |
139 |
mcs_out_domain_params(s, 1, 1, 1, 0x420); /* min params */ |
mcs_out_domain_params(s, 1, 1, 1, 0x420); /* min params */ |
140 |
mcs_out_domain_params(s, 0xffff, 0xfc17, 0xffff, 0xffff); /* max params */ |
mcs_out_domain_params(s, 0xffff, 0xfc17, 0xffff, 0xffff); /* max params */ |
141 |
|
|
147 |
} |
} |
148 |
|
|
149 |
/* Expect a MCS_CONNECT_RESPONSE message (ASN.1 BER) */ |
/* Expect a MCS_CONNECT_RESPONSE message (ASN.1 BER) */ |
150 |
static BOOL mcs_recv_connect_response(STREAM mcs_data) |
static BOOL |
151 |
|
mcs_recv_connect_response(STREAM mcs_data) |
152 |
{ |
{ |
153 |
uint8 result; |
uint8 result; |
154 |
int length; |
int length; |
155 |
STREAM s; |
STREAM s; |
156 |
|
|
157 |
s = iso_recv(); |
s = iso_recv(NULL); |
158 |
if (s == NULL) |
if (s == NULL) |
159 |
return False; |
return False; |
160 |
|
|
164 |
in_uint8(s, result); |
in_uint8(s, result); |
165 |
if (result != 0) |
if (result != 0) |
166 |
{ |
{ |
167 |
ERROR("MCS connect: %d\n", result); |
error("MCS connect: %d\n", result); |
168 |
return False; |
return False; |
169 |
} |
} |
170 |
|
|
173 |
mcs_parse_domain_params(s); |
mcs_parse_domain_params(s); |
174 |
|
|
175 |
ber_parse_header(s, BER_TAG_OCTET_STRING, &length); |
ber_parse_header(s, BER_TAG_OCTET_STRING, &length); |
|
if (length > mcs_data->size) |
|
|
{ |
|
|
WARN("MCS data length %d\n", length); |
|
|
length = mcs_data->size; |
|
|
} |
|
|
|
|
|
in_uint8a(s, mcs_data->data, length); |
|
|
mcs_data->p = mcs_data->data; |
|
|
mcs_data->end = mcs_data->data + length; |
|
176 |
|
|
177 |
|
sec_process_mcs_data(s); |
178 |
|
/* |
179 |
|
if (length > mcs_data->size) |
180 |
|
{ |
181 |
|
error("MCS data length %d, expected %d\n", length, |
182 |
|
mcs_data->size); |
183 |
|
length = mcs_data->size; |
184 |
|
} |
185 |
|
|
186 |
|
in_uint8a(s, mcs_data->data, length); |
187 |
|
mcs_data->p = mcs_data->data; |
188 |
|
mcs_data->end = mcs_data->data + length; |
189 |
|
*/ |
190 |
return s_check_end(s); |
return s_check_end(s); |
191 |
} |
} |
192 |
|
|
193 |
/* Send an EDrq message (ASN.1 PER) */ |
/* Send an EDrq message (ASN.1 PER) */ |
194 |
static void mcs_send_edrq() |
static void |
195 |
|
mcs_send_edrq(void) |
196 |
{ |
{ |
197 |
STREAM s; |
STREAM s; |
198 |
|
|
207 |
} |
} |
208 |
|
|
209 |
/* Send an AUrq message (ASN.1 PER) */ |
/* Send an AUrq message (ASN.1 PER) */ |
210 |
static void mcs_send_aurq() |
static void |
211 |
|
mcs_send_aurq(void) |
212 |
{ |
{ |
213 |
STREAM s; |
STREAM s; |
214 |
|
|
221 |
} |
} |
222 |
|
|
223 |
/* Expect a AUcf message (ASN.1 PER) */ |
/* Expect a AUcf message (ASN.1 PER) */ |
224 |
static BOOL mcs_recv_aucf(uint16 *mcs_userid) |
static BOOL |
225 |
|
mcs_recv_aucf(uint16 * mcs_userid) |
226 |
{ |
{ |
227 |
uint8 opcode, result; |
uint8 opcode, result; |
228 |
STREAM s; |
STREAM s; |
229 |
|
|
230 |
s = iso_recv(); |
s = iso_recv(NULL); |
231 |
if (s == NULL) |
if (s == NULL) |
232 |
return False; |
return False; |
233 |
|
|
234 |
in_uint8(s, opcode); |
in_uint8(s, opcode); |
235 |
if ((opcode >> 2) != MCS_AUCF) |
if ((opcode >> 2) != MCS_AUCF) |
236 |
{ |
{ |
237 |
ERROR("expected AUcf, got %d\n", opcode); |
error("expected AUcf, got %d\n", opcode); |
238 |
return False; |
return False; |
239 |
} |
} |
240 |
|
|
241 |
in_uint8(s, result); |
in_uint8(s, result); |
242 |
if (result != 0) |
if (result != 0) |
243 |
{ |
{ |
244 |
ERROR("AUrq: %d\n", result); |
error("AUrq: %d\n", result); |
245 |
return False; |
return False; |
246 |
} |
} |
247 |
|
|
252 |
} |
} |
253 |
|
|
254 |
/* Send a CJrq message (ASN.1 PER) */ |
/* Send a CJrq message (ASN.1 PER) */ |
255 |
static void mcs_send_cjrq(uint16 chanid) |
static void |
256 |
|
mcs_send_cjrq(uint16 chanid) |
257 |
{ |
{ |
258 |
STREAM s; |
STREAM s; |
259 |
|
|
260 |
|
DEBUG_RDP5(("Sending CJRQ for channel #%d\n", chanid)); |
261 |
|
|
262 |
s = iso_init(5); |
s = iso_init(5); |
263 |
|
|
264 |
out_uint8(s, (MCS_CJRQ << 2)); |
out_uint8(s, (MCS_CJRQ << 2)); |
265 |
out_uint16_be(s, mcs_userid); |
out_uint16_be(s, g_mcs_userid); |
266 |
out_uint16_be(s, chanid); |
out_uint16_be(s, chanid); |
267 |
|
|
268 |
s_mark_end(s); |
s_mark_end(s); |
270 |
} |
} |
271 |
|
|
272 |
/* Expect a CJcf message (ASN.1 PER) */ |
/* Expect a CJcf message (ASN.1 PER) */ |
273 |
static BOOL mcs_recv_cjcf() |
static BOOL |
274 |
|
mcs_recv_cjcf(void) |
275 |
{ |
{ |
276 |
uint8 opcode, result; |
uint8 opcode, result; |
277 |
STREAM s; |
STREAM s; |
278 |
|
|
279 |
s = iso_recv(); |
s = iso_recv(NULL); |
280 |
if (s == NULL) |
if (s == NULL) |
281 |
return False; |
return False; |
282 |
|
|
283 |
in_uint8(s, opcode); |
in_uint8(s, opcode); |
284 |
if ((opcode >> 2) != MCS_CJCF) |
if ((opcode >> 2) != MCS_CJCF) |
285 |
{ |
{ |
286 |
ERROR("expected CJcf, got %d\n", opcode); |
error("expected CJcf, got %d\n", opcode); |
287 |
return False; |
return False; |
288 |
} |
} |
289 |
|
|
290 |
in_uint8(s, result); |
in_uint8(s, result); |
291 |
if (result != 0) |
if (result != 0) |
292 |
{ |
{ |
293 |
ERROR("CJrq: %d\n", result); |
error("CJrq: %d\n", result); |
294 |
return False; |
return False; |
295 |
} |
} |
296 |
|
|
302 |
} |
} |
303 |
|
|
304 |
/* Initialise an MCS transport data packet */ |
/* Initialise an MCS transport data packet */ |
305 |
STREAM mcs_init(int length) |
STREAM |
306 |
|
mcs_init(int length) |
307 |
{ |
{ |
308 |
STREAM s; |
STREAM s; |
309 |
|
|
313 |
return s; |
return s; |
314 |
} |
} |
315 |
|
|
316 |
/* Send an MCS transport data packet */ |
/* Send an MCS transport data packet to a specific channel */ |
317 |
void mcs_send(STREAM s) |
void |
318 |
|
mcs_send_to_channel(STREAM s, uint16 channel) |
319 |
{ |
{ |
320 |
uint16 length; |
uint16 length; |
321 |
|
|
324 |
length |= 0x8000; |
length |= 0x8000; |
325 |
|
|
326 |
out_uint8(s, (MCS_SDRQ << 2)); |
out_uint8(s, (MCS_SDRQ << 2)); |
327 |
out_uint16_be(s, mcs_userid); |
out_uint16_be(s, g_mcs_userid); |
328 |
out_uint16_be(s, MCS_GLOBAL_CHANNEL); |
out_uint16_be(s, channel); |
329 |
out_uint8(s, 0x70); /* flags */ |
out_uint8(s, 0x70); /* flags */ |
330 |
out_uint16_be(s, length); |
out_uint16_be(s, length); |
331 |
|
|
332 |
iso_send(s); |
iso_send(s); |
333 |
} |
} |
334 |
|
|
335 |
|
/* Send an MCS transport data packet to the global channel */ |
336 |
|
void |
337 |
|
mcs_send(STREAM s) |
338 |
|
{ |
339 |
|
mcs_send_to_channel(s, MCS_GLOBAL_CHANNEL); |
340 |
|
} |
341 |
|
|
342 |
/* Receive an MCS transport data packet */ |
/* Receive an MCS transport data packet */ |
343 |
STREAM mcs_recv() |
STREAM |
344 |
|
mcs_recv(uint16 * channel, uint8 * rdpver) |
345 |
{ |
{ |
346 |
uint8 opcode, appid, length; |
uint8 opcode, appid, length; |
347 |
STREAM s; |
STREAM s; |
348 |
|
|
349 |
s = iso_recv(); |
s = iso_recv(rdpver); |
350 |
if (s == NULL) |
if (s == NULL) |
351 |
return NULL; |
return NULL; |
352 |
|
if (rdpver != NULL) |
353 |
|
if (*rdpver != 3) |
354 |
|
return s; |
355 |
in_uint8(s, opcode); |
in_uint8(s, opcode); |
356 |
appid = opcode >> 2; |
appid = opcode >> 2; |
357 |
if (appid != MCS_SDIN) |
if (appid != MCS_SDIN) |
358 |
{ |
{ |
359 |
if (appid != MCS_DPUM) |
if (appid != MCS_DPUM) |
360 |
{ |
{ |
361 |
ERROR("expected data, got %d\n", opcode); |
error("expected data, got %d\n", opcode); |
362 |
} |
} |
363 |
return NULL; |
return NULL; |
364 |
} |
} |
365 |
|
in_uint8s(s, 2); /* userid */ |
366 |
in_uint8s(s, 5); /* userid, chanid, flags */ |
in_uint16_be(s, *channel); |
367 |
|
in_uint8s(s, 1); /* flags */ |
368 |
in_uint8(s, length); |
in_uint8(s, length); |
369 |
if (length & 0x80) |
if (length & 0x80) |
370 |
in_uint8s(s, 1); /* second byte of length */ |
in_uint8s(s, 1); /* second byte of length */ |
|
|
|
371 |
return s; |
return s; |
372 |
} |
} |
373 |
|
|
374 |
/* Establish a connection up to the MCS layer */ |
/* Establish a connection up to the MCS layer */ |
375 |
BOOL mcs_connect(char *server, STREAM mcs_data) |
BOOL |
376 |
|
mcs_connect(char *server, STREAM mcs_data, char *username) |
377 |
{ |
{ |
378 |
if (!iso_connect(server)) |
unsigned int i; |
379 |
|
|
380 |
|
if (!iso_connect(server, username)) |
381 |
return False; |
return False; |
382 |
|
|
383 |
mcs_send_connect_initial(mcs_data); |
mcs_send_connect_initial(mcs_data); |
387 |
mcs_send_edrq(); |
mcs_send_edrq(); |
388 |
|
|
389 |
mcs_send_aurq(); |
mcs_send_aurq(); |
390 |
if (!mcs_recv_aucf(&mcs_userid)) |
if (!mcs_recv_aucf(&g_mcs_userid)) |
391 |
goto error; |
goto error; |
392 |
|
|
393 |
mcs_send_cjrq(mcs_userid + 1001); |
mcs_send_cjrq(g_mcs_userid + MCS_USERCHANNEL_BASE); |
394 |
|
|
395 |
if (!mcs_recv_cjcf()) |
if (!mcs_recv_cjcf()) |
396 |
goto error; |
goto error; |
397 |
|
|
399 |
if (!mcs_recv_cjcf()) |
if (!mcs_recv_cjcf()) |
400 |
goto error; |
goto error; |
401 |
|
|
402 |
|
for (i = 0; i < g_num_channels; i++) |
403 |
|
{ |
404 |
|
mcs_send_cjrq(g_channels[i].mcs_id); |
405 |
|
if (!mcs_recv_cjcf()) |
406 |
|
goto error; |
407 |
|
} |
408 |
|
return True; |
409 |
|
|
410 |
|
error: |
411 |
|
iso_disconnect(); |
412 |
|
return False; |
413 |
|
} |
414 |
|
|
415 |
|
/* Establish a connection up to the MCS layer */ |
416 |
|
BOOL |
417 |
|
mcs_reconnect(char *server, STREAM mcs_data) |
418 |
|
{ |
419 |
|
unsigned int i; |
420 |
|
|
421 |
|
if (!iso_reconnect(server)) |
422 |
|
return False; |
423 |
|
|
424 |
|
mcs_send_connect_initial(mcs_data); |
425 |
|
if (!mcs_recv_connect_response(mcs_data)) |
426 |
|
goto error; |
427 |
|
|
428 |
|
mcs_send_edrq(); |
429 |
|
|
430 |
|
mcs_send_aurq(); |
431 |
|
if (!mcs_recv_aucf(&g_mcs_userid)) |
432 |
|
goto error; |
433 |
|
|
434 |
|
mcs_send_cjrq(g_mcs_userid + MCS_USERCHANNEL_BASE); |
435 |
|
|
436 |
|
if (!mcs_recv_cjcf()) |
437 |
|
goto error; |
438 |
|
|
439 |
|
mcs_send_cjrq(MCS_GLOBAL_CHANNEL); |
440 |
|
if (!mcs_recv_cjcf()) |
441 |
|
goto error; |
442 |
|
|
443 |
|
for (i = 0; i < g_num_channels; i++) |
444 |
|
{ |
445 |
|
mcs_send_cjrq(g_channels[i].mcs_id); |
446 |
|
if (!mcs_recv_cjcf()) |
447 |
|
goto error; |
448 |
|
} |
449 |
return True; |
return True; |
450 |
|
|
451 |
error: |
error: |
454 |
} |
} |
455 |
|
|
456 |
/* Disconnect from the MCS layer */ |
/* Disconnect from the MCS layer */ |
457 |
void mcs_disconnect() |
void |
458 |
|
mcs_disconnect(void) |
459 |
{ |
{ |
460 |
iso_disconnect(); |
iso_disconnect(); |
461 |
} |
} |
462 |
|
|
463 |
|
/* reset the state of the mcs layer */ |
464 |
|
void |
465 |
|
mcs_reset_state(void) |
466 |
|
{ |
467 |
|
g_mcs_userid = 0; |
468 |
|
iso_reset_state(); |
469 |
|
} |