1 |
forsberg |
348 |
/* -*- c-basic-offset: 8 -*- |
2 |
matty |
3 |
rdesktop: A Remote Desktop Protocol client. |
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Protocol services - Multipoint Communications Service |
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jsorg71 |
1365 |
Copyright (C) Matthew Chapman 1999-2007 |
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matty |
3 |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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jsorg71 |
1365 |
|
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matty |
3 |
This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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jsorg71 |
1365 |
|
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matty |
3 |
You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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matty |
10 |
#include "rdesktop.h" |
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matty |
3 |
|
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jsorg71 |
381 |
uint16 g_mcs_userid; |
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matthewc |
432 |
extern VCHANNEL g_channels[]; |
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extern unsigned int g_num_channels; |
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matty |
10 |
|
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/* Parse an ASN.1 BER header */ |
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jsorg71 |
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static RD_BOOL |
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matty |
25 |
ber_parse_header(STREAM s, int tagval, int *length) |
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matty |
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{ |
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matty |
10 |
int tag, len; |
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matty |
3 |
|
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matty |
10 |
if (tagval > 0xff) |
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matty |
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{ |
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matty |
10 |
in_uint16_be(s, tag); |
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matty |
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} |
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matty |
10 |
else |
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matty |
3 |
{ |
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jsorg71 |
1379 |
in_uint8(s, tag); |
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} |
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matty |
3 |
|
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matty |
10 |
if (tag != tagval) |
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matty |
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{ |
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matty |
30 |
error("expected tag %d, got %d\n", tagval, tag); |
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matty |
10 |
return False; |
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matty |
3 |
} |
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|
48 |
matty |
10 |
in_uint8(s, len); |
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matty |
3 |
|
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matty |
10 |
if (len & 0x80) |
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matty |
3 |
{ |
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matty |
10 |
len &= ~0x80; |
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*length = 0; |
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while (len--) |
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next_be(s, *length); |
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matty |
3 |
} |
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matty |
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else |
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*length = len; |
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matty |
3 |
|
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matty |
10 |
return s_check(s); |
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matty |
3 |
} |
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|
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matty |
10 |
/* Output an ASN.1 BER header */ |
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matty |
25 |
static void |
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ber_out_header(STREAM s, int tagval, int length) |
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matty |
3 |
{ |
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matty |
10 |
if (tagval > 0xff) |
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matty |
3 |
{ |
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matty |
10 |
out_uint16_be(s, tagval); |
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matty |
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} |
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matty |
10 |
else |
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{ |
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out_uint8(s, tagval); |
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} |
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matty |
3 |
|
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matty |
10 |
if (length >= 0x80) |
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matty |
3 |
{ |
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matty |
10 |
out_uint8(s, 0x82); |
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out_uint16_be(s, length); |
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matty |
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} |
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matty |
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else |
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out_uint8(s, length); |
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matty |
3 |
} |
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|
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matty |
10 |
/* Output an ASN.1 BER integer */ |
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matty |
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static void |
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ber_out_integer(STREAM s, int value) |
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matty |
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{ |
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matty |
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ber_out_header(s, BER_TAG_INTEGER, 2); |
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out_uint16_be(s, value); |
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matty |
3 |
} |
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|
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matty |
10 |
/* Output a DOMAIN_PARAMS structure (ASN.1 BER) */ |
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matty |
25 |
static void |
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astrand |
82 |
mcs_out_domain_params(STREAM s, int max_channels, int max_users, int max_tokens, int max_pdusize) |
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matty |
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{ |
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matty |
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ber_out_header(s, MCS_TAG_DOMAIN_PARAMS, 32); |
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ber_out_integer(s, max_channels); |
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ber_out_integer(s, max_users); |
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ber_out_integer(s, max_tokens); |
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matty |
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ber_out_integer(s, 1); /* num_priorities */ |
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ber_out_integer(s, 0); /* min_throughput */ |
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ber_out_integer(s, 1); /* max_height */ |
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matty |
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ber_out_integer(s, max_pdusize); |
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matty |
24 |
ber_out_integer(s, 2); /* ver_protocol */ |
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matty |
3 |
} |
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|
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matty |
10 |
/* Parse a DOMAIN_PARAMS structure (ASN.1 BER) */ |
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jsorg71 |
1372 |
static RD_BOOL |
110 |
matty |
25 |
mcs_parse_domain_params(STREAM s) |
111 |
matty |
3 |
{ |
112 |
matty |
10 |
int length; |
113 |
matty |
3 |
|
114 |
matty |
10 |
ber_parse_header(s, MCS_TAG_DOMAIN_PARAMS, &length); |
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in_uint8s(s, length); |
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return s_check(s); |
118 |
matty |
3 |
} |
119 |
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|
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matty |
10 |
/* Send an MCS_CONNECT_INITIAL message (ASN.1 BER) */ |
121 |
matty |
25 |
static void |
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mcs_send_connect_initial(STREAM mcs_data) |
123 |
matty |
3 |
{ |
124 |
matty |
10 |
int datalen = mcs_data->end - mcs_data->data; |
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forsberg |
348 |
int length = 9 + 3 * 34 + 4 + datalen; |
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matty |
10 |
STREAM s; |
127 |
matty |
3 |
|
128 |
matty |
10 |
s = iso_init(length + 5); |
129 |
matty |
3 |
|
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matty |
10 |
ber_out_header(s, MCS_CONNECT_INITIAL, length); |
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forsberg |
348 |
ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* calling domain */ |
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out_uint8(s, 1); |
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ber_out_header(s, BER_TAG_OCTET_STRING, 1); /* called domain */ |
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out_uint8(s, 1); |
135 |
matty |
3 |
|
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matty |
10 |
ber_out_header(s, BER_TAG_BOOLEAN, 1); |
137 |
matty |
24 |
out_uint8(s, 0xff); /* upward flag */ |
138 |
matty |
3 |
|
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forsberg |
348 |
mcs_out_domain_params(s, 34, 2, 0, 0xffff); /* target params */ |
140 |
matty |
24 |
mcs_out_domain_params(s, 1, 1, 1, 0x420); /* min params */ |
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mcs_out_domain_params(s, 0xffff, 0xfc17, 0xffff, 0xffff); /* max params */ |
142 |
matty |
3 |
|
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matty |
10 |
ber_out_header(s, BER_TAG_OCTET_STRING, datalen); |
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out_uint8p(s, mcs_data->data, datalen); |
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matty |
3 |
|
146 |
matty |
10 |
s_mark_end(s); |
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iso_send(s); |
148 |
matty |
3 |
} |
149 |
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|
150 |
matty |
10 |
/* Expect a MCS_CONNECT_RESPONSE message (ASN.1 BER) */ |
151 |
jsorg71 |
1372 |
static RD_BOOL |
152 |
matty |
25 |
mcs_recv_connect_response(STREAM mcs_data) |
153 |
matty |
3 |
{ |
154 |
matty |
10 |
uint8 result; |
155 |
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int length; |
156 |
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STREAM s; |
157 |
matty |
3 |
|
158 |
jsorg71 |
733 |
s = iso_recv(NULL); |
159 |
matty |
10 |
if (s == NULL) |
160 |
matty |
7 |
return False; |
161 |
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|
162 |
matty |
10 |
ber_parse_header(s, MCS_CONNECT_RESPONSE, &length); |
163 |
matty |
3 |
|
164 |
matty |
10 |
ber_parse_header(s, BER_TAG_RESULT, &length); |
165 |
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in_uint8(s, result); |
166 |
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if (result != 0) |
167 |
matty |
7 |
{ |
168 |
matty |
30 |
error("MCS connect: %d\n", result); |
169 |
matty |
3 |
return False; |
170 |
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} |
171 |
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|
172 |
matty |
10 |
ber_parse_header(s, BER_TAG_INTEGER, &length); |
173 |
matty |
24 |
in_uint8s(s, length); /* connect id */ |
174 |
matty |
10 |
mcs_parse_domain_params(s); |
175 |
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176 |
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ber_parse_header(s, BER_TAG_OCTET_STRING, &length); |
177 |
matty |
3 |
|
178 |
forsberg |
348 |
sec_process_mcs_data(s); |
179 |
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/* |
180 |
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if (length > mcs_data->size) |
181 |
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{ |
182 |
jsorg71 |
381 |
error("MCS data length %d, expected %d\n", length, |
183 |
forsberg |
348 |
mcs_data->size); |
184 |
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length = mcs_data->size; |
185 |
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} |
186 |
matty |
3 |
|
187 |
forsberg |
348 |
in_uint8a(s, mcs_data->data, length); |
188 |
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mcs_data->p = mcs_data->data; |
189 |
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mcs_data->end = mcs_data->data + length; |
190 |
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*/ |
191 |
matty |
10 |
return s_check_end(s); |
192 |
matty |
3 |
} |
193 |
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|
194 |
matty |
10 |
/* Send an EDrq message (ASN.1 PER) */ |
195 |
matty |
25 |
static void |
196 |
matthewc |
192 |
mcs_send_edrq(void) |
197 |
matty |
3 |
{ |
198 |
matty |
10 |
STREAM s; |
199 |
matty |
3 |
|
200 |
matty |
10 |
s = iso_init(5); |
201 |
matty |
3 |
|
202 |
matty |
10 |
out_uint8(s, (MCS_EDRQ << 2)); |
203 |
matty |
24 |
out_uint16_be(s, 1); /* height */ |
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out_uint16_be(s, 1); /* interval */ |
205 |
matty |
3 |
|
206 |
matty |
10 |
s_mark_end(s); |
207 |
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iso_send(s); |
208 |
matty |
3 |
} |
209 |
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|
210 |
matty |
10 |
/* Send an AUrq message (ASN.1 PER) */ |
211 |
matty |
25 |
static void |
212 |
matthewc |
192 |
mcs_send_aurq(void) |
213 |
matty |
3 |
{ |
214 |
matty |
10 |
STREAM s; |
215 |
matty |
3 |
|
216 |
matty |
10 |
s = iso_init(1); |
217 |
matty |
3 |
|
218 |
matty |
10 |
out_uint8(s, (MCS_AURQ << 2)); |
219 |
matty |
3 |
|
220 |
matty |
10 |
s_mark_end(s); |
221 |
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iso_send(s); |
222 |
matty |
3 |
} |
223 |
|
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|
224 |
matty |
10 |
/* Expect a AUcf message (ASN.1 PER) */ |
225 |
jsorg71 |
1372 |
static RD_BOOL |
226 |
astrand |
64 |
mcs_recv_aucf(uint16 * mcs_userid) |
227 |
matty |
3 |
{ |
228 |
matty |
10 |
uint8 opcode, result; |
229 |
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STREAM s; |
230 |
matty |
3 |
|
231 |
jsorg71 |
733 |
s = iso_recv(NULL); |
232 |
matty |
10 |
if (s == NULL) |
233 |
matty |
3 |
return False; |
234 |
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|
235 |
matty |
10 |
in_uint8(s, opcode); |
236 |
|
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if ((opcode >> 2) != MCS_AUCF) |
237 |
matty |
3 |
{ |
238 |
matty |
30 |
error("expected AUcf, got %d\n", opcode); |
239 |
matty |
3 |
return False; |
240 |
|
|
} |
241 |
|
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|
242 |
matty |
10 |
in_uint8(s, result); |
243 |
|
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if (result != 0) |
244 |
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{ |
245 |
matty |
30 |
error("AUrq: %d\n", result); |
246 |
matty |
10 |
return False; |
247 |
|
|
} |
248 |
matty |
3 |
|
249 |
matty |
10 |
if (opcode & 2) |
250 |
|
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in_uint16_be(s, *mcs_userid); |
251 |
matty |
3 |
|
252 |
matty |
10 |
return s_check_end(s); |
253 |
matty |
3 |
} |
254 |
|
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|
255 |
matty |
10 |
/* Send a CJrq message (ASN.1 PER) */ |
256 |
matty |
25 |
static void |
257 |
|
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mcs_send_cjrq(uint16 chanid) |
258 |
matty |
3 |
{ |
259 |
matty |
10 |
STREAM s; |
260 |
matty |
3 |
|
261 |
forsberg |
409 |
DEBUG_RDP5(("Sending CJRQ for channel #%d\n", chanid)); |
262 |
|
|
|
263 |
matty |
10 |
s = iso_init(5); |
264 |
matty |
3 |
|
265 |
matty |
10 |
out_uint8(s, (MCS_CJRQ << 2)); |
266 |
jsorg71 |
381 |
out_uint16_be(s, g_mcs_userid); |
267 |
matty |
10 |
out_uint16_be(s, chanid); |
268 |
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|
269 |
|
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s_mark_end(s); |
270 |
|
|
iso_send(s); |
271 |
matty |
3 |
} |
272 |
|
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|
273 |
matty |
10 |
/* Expect a CJcf message (ASN.1 PER) */ |
274 |
jsorg71 |
1372 |
static RD_BOOL |
275 |
matthewc |
192 |
mcs_recv_cjcf(void) |
276 |
matty |
3 |
{ |
277 |
matty |
10 |
uint8 opcode, result; |
278 |
|
|
STREAM s; |
279 |
matty |
3 |
|
280 |
jsorg71 |
733 |
s = iso_recv(NULL); |
281 |
matty |
10 |
if (s == NULL) |
282 |
|
|
return False; |
283 |
matty |
3 |
|
284 |
matty |
10 |
in_uint8(s, opcode); |
285 |
|
|
if ((opcode >> 2) != MCS_CJCF) |
286 |
|
|
{ |
287 |
matty |
30 |
error("expected CJcf, got %d\n", opcode); |
288 |
matty |
10 |
return False; |
289 |
|
|
} |
290 |
matty |
3 |
|
291 |
matty |
10 |
in_uint8(s, result); |
292 |
|
|
if (result != 0) |
293 |
matty |
3 |
{ |
294 |
matty |
30 |
error("CJrq: %d\n", result); |
295 |
matty |
3 |
return False; |
296 |
|
|
} |
297 |
|
|
|
298 |
matty |
24 |
in_uint8s(s, 4); /* mcs_userid, req_chanid */ |
299 |
matty |
10 |
if (opcode & 2) |
300 |
matty |
24 |
in_uint8s(s, 2); /* join_chanid */ |
301 |
matty |
3 |
|
302 |
matty |
10 |
return s_check_end(s); |
303 |
matty |
3 |
} |
304 |
|
|
|
305 |
matty |
10 |
/* Initialise an MCS transport data packet */ |
306 |
matty |
25 |
STREAM |
307 |
|
|
mcs_init(int length) |
308 |
matty |
3 |
{ |
309 |
matty |
10 |
STREAM s; |
310 |
matty |
3 |
|
311 |
matty |
10 |
s = iso_init(length + 8); |
312 |
|
|
s_push_layer(s, mcs_hdr, 8); |
313 |
matty |
3 |
|
314 |
matty |
10 |
return s; |
315 |
matty |
3 |
} |
316 |
|
|
|
317 |
forsberg |
409 |
/* Send an MCS transport data packet to a specific channel */ |
318 |
matty |
25 |
void |
319 |
forsberg |
409 |
mcs_send_to_channel(STREAM s, uint16 channel) |
320 |
matty |
3 |
{ |
321 |
matty |
10 |
uint16 length; |
322 |
matty |
3 |
|
323 |
matty |
10 |
s_pop_layer(s, mcs_hdr); |
324 |
|
|
length = s->end - s->p - 8; |
325 |
|
|
length |= 0x8000; |
326 |
matty |
3 |
|
327 |
matty |
10 |
out_uint8(s, (MCS_SDRQ << 2)); |
328 |
jsorg71 |
381 |
out_uint16_be(s, g_mcs_userid); |
329 |
forsberg |
409 |
out_uint16_be(s, channel); |
330 |
matty |
24 |
out_uint8(s, 0x70); /* flags */ |
331 |
matty |
10 |
out_uint16_be(s, length); |
332 |
matty |
3 |
|
333 |
matty |
10 |
iso_send(s); |
334 |
matty |
3 |
} |
335 |
|
|
|
336 |
forsberg |
409 |
/* Send an MCS transport data packet to the global channel */ |
337 |
|
|
void |
338 |
|
|
mcs_send(STREAM s) |
339 |
|
|
{ |
340 |
|
|
mcs_send_to_channel(s, MCS_GLOBAL_CHANNEL); |
341 |
|
|
} |
342 |
|
|
|
343 |
matty |
10 |
/* Receive an MCS transport data packet */ |
344 |
matty |
25 |
STREAM |
345 |
jsorg71 |
733 |
mcs_recv(uint16 * channel, uint8 * rdpver) |
346 |
matty |
3 |
{ |
347 |
matty |
10 |
uint8 opcode, appid, length; |
348 |
|
|
STREAM s; |
349 |
matty |
3 |
|
350 |
jsorg71 |
733 |
s = iso_recv(rdpver); |
351 |
matty |
10 |
if (s == NULL) |
352 |
|
|
return NULL; |
353 |
jsorg71 |
733 |
if (rdpver != NULL) |
354 |
|
|
if (*rdpver != 3) |
355 |
|
|
return s; |
356 |
matty |
10 |
in_uint8(s, opcode); |
357 |
|
|
appid = opcode >> 2; |
358 |
|
|
if (appid != MCS_SDIN) |
359 |
matty |
3 |
{ |
360 |
matty |
10 |
if (appid != MCS_DPUM) |
361 |
|
|
{ |
362 |
matty |
30 |
error("expected data, got %d\n", opcode); |
363 |
matty |
10 |
} |
364 |
|
|
return NULL; |
365 |
matty |
3 |
} |
366 |
forsberg |
348 |
in_uint8s(s, 2); /* userid */ |
367 |
|
|
in_uint16_be(s, *channel); |
368 |
|
|
in_uint8s(s, 1); /* flags */ |
369 |
matty |
10 |
in_uint8(s, length); |
370 |
|
|
if (length & 0x80) |
371 |
matty |
24 |
in_uint8s(s, 1); /* second byte of length */ |
372 |
matty |
10 |
return s; |
373 |
matty |
3 |
} |
374 |
|
|
|
375 |
matty |
10 |
/* Establish a connection up to the MCS layer */ |
376 |
jsorg71 |
1372 |
RD_BOOL |
377 |
forsberg |
348 |
mcs_connect(char *server, STREAM mcs_data, char *username) |
378 |
matty |
3 |
{ |
379 |
matthewc |
432 |
unsigned int i; |
380 |
|
|
|
381 |
forsberg |
348 |
if (!iso_connect(server, username)) |
382 |
matty |
3 |
return False; |
383 |
|
|
|
384 |
matty |
10 |
mcs_send_connect_initial(mcs_data); |
385 |
|
|
if (!mcs_recv_connect_response(mcs_data)) |
386 |
|
|
goto error; |
387 |
matty |
3 |
|
388 |
matty |
10 |
mcs_send_edrq(); |
389 |
matty |
3 |
|
390 |
matty |
10 |
mcs_send_aurq(); |
391 |
jsorg71 |
381 |
if (!mcs_recv_aucf(&g_mcs_userid)) |
392 |
matty |
10 |
goto error; |
393 |
matty |
3 |
|
394 |
forsberg |
409 |
mcs_send_cjrq(g_mcs_userid + MCS_USERCHANNEL_BASE); |
395 |
|
|
|
396 |
matty |
10 |
if (!mcs_recv_cjcf()) |
397 |
|
|
goto error; |
398 |
matty |
3 |
|
399 |
matty |
10 |
mcs_send_cjrq(MCS_GLOBAL_CHANNEL); |
400 |
|
|
if (!mcs_recv_cjcf()) |
401 |
|
|
goto error; |
402 |
matty |
3 |
|
403 |
matthewc |
432 |
for (i = 0; i < g_num_channels; i++) |
404 |
forsberg |
348 |
{ |
405 |
matthewc |
432 |
mcs_send_cjrq(g_channels[i].mcs_id); |
406 |
|
|
if (!mcs_recv_cjcf()) |
407 |
|
|
goto error; |
408 |
forsberg |
348 |
} |
409 |
matty |
10 |
return True; |
410 |
matty |
7 |
|
411 |
matty |
24 |
error: |
412 |
matty |
10 |
iso_disconnect(); |
413 |
|
|
return False; |
414 |
matty |
3 |
} |
415 |
matty |
7 |
|
416 |
astrand |
977 |
/* Establish a connection up to the MCS layer */ |
417 |
jsorg71 |
1372 |
RD_BOOL |
418 |
astrand |
977 |
mcs_reconnect(char *server, STREAM mcs_data) |
419 |
|
|
{ |
420 |
|
|
unsigned int i; |
421 |
|
|
|
422 |
|
|
if (!iso_reconnect(server)) |
423 |
|
|
return False; |
424 |
|
|
|
425 |
|
|
mcs_send_connect_initial(mcs_data); |
426 |
|
|
if (!mcs_recv_connect_response(mcs_data)) |
427 |
|
|
goto error; |
428 |
|
|
|
429 |
|
|
mcs_send_edrq(); |
430 |
|
|
|
431 |
|
|
mcs_send_aurq(); |
432 |
|
|
if (!mcs_recv_aucf(&g_mcs_userid)) |
433 |
|
|
goto error; |
434 |
|
|
|
435 |
|
|
mcs_send_cjrq(g_mcs_userid + MCS_USERCHANNEL_BASE); |
436 |
|
|
|
437 |
|
|
if (!mcs_recv_cjcf()) |
438 |
|
|
goto error; |
439 |
|
|
|
440 |
|
|
mcs_send_cjrq(MCS_GLOBAL_CHANNEL); |
441 |
|
|
if (!mcs_recv_cjcf()) |
442 |
|
|
goto error; |
443 |
|
|
|
444 |
|
|
for (i = 0; i < g_num_channels; i++) |
445 |
|
|
{ |
446 |
|
|
mcs_send_cjrq(g_channels[i].mcs_id); |
447 |
|
|
if (!mcs_recv_cjcf()) |
448 |
|
|
goto error; |
449 |
|
|
} |
450 |
|
|
return True; |
451 |
|
|
|
452 |
|
|
error: |
453 |
|
|
iso_disconnect(); |
454 |
|
|
return False; |
455 |
|
|
} |
456 |
|
|
|
457 |
matty |
10 |
/* Disconnect from the MCS layer */ |
458 |
matty |
25 |
void |
459 |
matthewc |
192 |
mcs_disconnect(void) |
460 |
matty |
10 |
{ |
461 |
|
|
iso_disconnect(); |
462 |
|
|
} |
463 |
astrand |
977 |
|
464 |
|
|
/* reset the state of the mcs layer */ |
465 |
|
|
void |
466 |
|
|
mcs_reset_state(void) |
467 |
|
|
{ |
468 |
|
|
g_mcs_userid = 0; |
469 |
|
|
iso_reset_state(); |
470 |
|
|
} |