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added rdp_mcs.c

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ulab-original
jsorg71 19 years ago
parent 8d9be76c4e
commit 4e8b16669e
1 changed files with 549 additions and 0 deletions
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rdp/rdp_mcs.c
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/*
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.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005
librdp mcs layer
*/
#include "rdp.h"
/*****************************************************************************/
struct rdp_mcs* APP_CC
rdp_mcs_create(struct rdp_sec* owner,
struct stream* client_mcs_data,
struct stream* server_mcs_data)
{
struct rdp_mcs* self;
self = (struct rdp_mcs*)g_malloc(sizeof(struct rdp_mcs), 1);
self->sec_layer = owner;
self->userid = 1;
self->chanid = 1001;
self->client_mcs_data = client_mcs_data;
self->server_mcs_data = server_mcs_data;
self->iso_layer = rdp_iso_create(self);
return self;
}
/*****************************************************************************/
void APP_CC
rdp_mcs_delete(struct rdp_mcs* self)
{
if (self == 0)
{
return;
}
rdp_iso_delete(self->iso_layer);
g_free(self);
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_mcs_recv(struct rdp_mcs* self, struct stream* s, int* chan)
{
int appid;
int opcode;
int len;
if (rdp_iso_recv(self->iso_layer, s) != 0)
{
return 1;
}
in_uint8(s, opcode);
appid = opcode >> 2;
if (appid != MCS_SDIN)
{
return 1;
}
in_uint8s(s, 5);
in_uint8(s, len);
if (len & 0x80)
{
in_uint8s(s, 1);
}
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_ber_out_header(struct rdp_mcs* self, struct stream* s,
int tag_val, int len)
{
if (tag_val > 0xff)
{
out_uint16_be(s, tag_val);
}
else
{
out_uint8(s, tag_val);
}
if (len >= 0x80)
{
out_uint8(s, 0x82);
out_uint16_be(s, len);
}
else
{
out_uint8(s, len);
}
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_ber_out_int8(struct rdp_mcs* self, struct stream* s, int value)
{
rdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 1);
out_uint8(s, value);
return 0;
}
/*****************************************************************************/
/* returns error */
#if 0
static int APP_CC
rdp_mcs_ber_out_int16(struct rdp_mcs* self, struct stream* s, int value)
{
rdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 2);
out_uint8(s, (value >> 8));
out_uint8(s, value);
return 0;
}
#endif
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_ber_out_int24(struct rdp_mcs* self, struct stream* s, int value)
{
rdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 3);
out_uint8(s, (value >> 16));
out_uint8(s, (value >> 8));
out_uint8(s, value);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_out_domain_params(struct rdp_mcs* self, struct stream* s,
int max_channels,
int max_users, int max_tokens,
int max_pdu_size)
{
rdp_mcs_ber_out_header(self, s, MCS_TAG_DOMAIN_PARAMS, 26);
rdp_mcs_ber_out_int8(self, s, max_channels);
rdp_mcs_ber_out_int8(self, s, max_users);
rdp_mcs_ber_out_int8(self, s, max_tokens);
rdp_mcs_ber_out_int8(self, s, 1);
rdp_mcs_ber_out_int8(self, s, 0);
rdp_mcs_ber_out_int8(self, s, 1);
rdp_mcs_ber_out_int24(self, s, max_pdu_size);
rdp_mcs_ber_out_int8(self, s, 2);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_send_connection_initial(struct rdp_mcs* self)
{
int data_len;
int len;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
data_len = self->server_mcs_data->end - self->server_mcs_data->data;
len = 7 + 3 * 34 + 4 + data_len;
if (rdp_iso_init(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
rdp_mcs_ber_out_header(self, s, MCS_CONNECT_INITIAL, len);
rdp_mcs_ber_out_header(self, s, BER_TAG_OCTET_STRING, 0); /* calling domain */
rdp_mcs_ber_out_header(self, s, BER_TAG_OCTET_STRING, 0); /* called domain */
rdp_mcs_ber_out_header(self, s, BER_TAG_BOOLEAN, 1);
out_uint8(s, 0xff); /* upward flag */
rdp_mcs_out_domain_params(self, s, 2, 2, 0, 0xffff); /* target params */
rdp_mcs_out_domain_params(self, s, 1, 1, 1, 0x420); /* min params */
rdp_mcs_out_domain_params(self, s, 0xffff, 0xfc17, 0xffff, 0xffff); /* max params */
rdp_mcs_ber_out_header(self, s, BER_TAG_OCTET_STRING, data_len);
out_uint8p(s, self->server_mcs_data->data, data_len);
s_mark_end(s);
if (rdp_iso_send(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_ber_parse_header(struct rdp_mcs* self, struct stream* s,
int tag_val, int* len)
{
int tag;
int l;
int i;
if (tag_val > 0xff)
{
in_uint16_be(s, tag);
}
else
{
in_uint8(s, tag);
}
if (tag != tag_val)
{
return 1;
}
in_uint8(s, l);
if (l & 0x80)
{
l = l & ~0x80;
*len = 0;
while (l > 0)
{
in_uint8(s, i);
*len = (*len << 8) | i;
l--;
}
}
else
{
*len = l;
}
if (s_check(s))
{
return 0;
}
else
{
return 1;
}
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_parse_domain_params(struct rdp_mcs* self, struct stream* s)
{
int len;
if (rdp_mcs_ber_parse_header(self, s, MCS_TAG_DOMAIN_PARAMS, &len) != 0)
{
return 1;
}
in_uint8s(s, len);
if (s_check(s))
{
return 0;
}
else
{
return 1;
}
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_recv_connection_response(struct rdp_mcs* self)
{
int len;
int res;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_recv(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
rdp_mcs_ber_parse_header(self, s, MCS_CONNECT_RESPONSE, &len);
rdp_mcs_ber_parse_header(self, s, BER_TAG_RESULT, &len);
in_uint8(s, res);
if (res != 0)
{
free_stream(s);
return 1;
}
rdp_mcs_ber_parse_header(self, s, BER_TAG_INTEGER, &len);
in_uint8s(s, len); /* connect id */
rdp_mcs_parse_domain_params(self, s);
rdp_mcs_ber_parse_header(self, s, BER_TAG_OCTET_STRING, &len);
if (len > self->client_mcs_data->size)
{
len = self->client_mcs_data->size;
}
in_uint8a(s, self->client_mcs_data->data, len);
self->client_mcs_data->p = self->client_mcs_data->data;
self->client_mcs_data->end = self->client_mcs_data->data + len;
if (s_check_end(s))
{
free_stream(s);
return 0;
}
else
{
free_stream(s);
return 1;
}
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_send_edrq(struct rdp_mcs* self)
{
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_init(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
out_uint8(s, (MCS_EDRQ << 2));
out_uint16_be(s, 0x100); /* height */
out_uint16_be(s, 0x100); /* interval */
s_mark_end(s);
if (rdp_iso_send(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_send_aurq(struct rdp_mcs* self)
{
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_init(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
out_uint8(s, (MCS_AURQ << 2));
s_mark_end(s);
if (rdp_iso_send(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_recv_aucf(struct rdp_mcs* self)
{
int opcode;
int res;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_recv(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
in_uint8(s, opcode);
if ((opcode >> 2) != MCS_AUCF)
{
free_stream(s);
return 1;
}
in_uint8(s, res);
if (res != 0)
{
free_stream(s);
return 1;
}
if (opcode & 2)
{
in_uint16_be(s, self->userid);
}
if (!(s_check_end(s)))
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_send_cjrq(struct rdp_mcs* self, int chanid)
{
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_init(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
out_uint8(s, (MCS_CJRQ << 2));
out_uint16_be(s, self->userid);
out_uint16_be(s, chanid);
s_mark_end(s);
if (rdp_iso_send(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_mcs_recv_cjcf(struct rdp_mcs* self)
{
int opcode;
int res;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
if (rdp_iso_recv(self->iso_layer, s) != 0)
{
free_stream(s);
return 1;
}
in_uint8(s, opcode);
if ((opcode >> 2) != MCS_CJCF)
{
free_stream(s);
return 1;
}
in_uint8(s, res);
if (res != 0)
{
free_stream(s);
return 1;
}
in_uint8s(s, 4); /* mcs_userid, req_chanid */
if (opcode & 2)
{
in_uint8s(s, 2); /* join_chanid */
in_uint8s(s, self->userid);
}
if (!(s_check_end(s)))
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_mcs_connect(struct rdp_mcs* self, char* ip, char* port)
{
if (rdp_iso_connect(self->iso_layer, ip, port) != 0)
{
return 1;
}
rdp_mcs_send_connection_initial(self);
if (rdp_mcs_recv_connection_response(self) != 0)
{
rdp_iso_disconnect(self->iso_layer);
return 1;
}
rdp_mcs_send_edrq(self);
rdp_mcs_send_aurq(self);
if (rdp_mcs_recv_aucf(self) != 0)
{
rdp_iso_disconnect(self->iso_layer);
return 1;
}
rdp_mcs_send_cjrq(self, self->userid + 1001);
if (rdp_mcs_recv_cjcf(self) != 0)
{
rdp_iso_disconnect(self->iso_layer);
return 1;
}
rdp_mcs_send_cjrq(self, MCS_GLOBAL_CHANNEL);
if (rdp_mcs_recv_cjcf(self) != 0)
{
rdp_iso_disconnect(self->iso_layer);
return 1;
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_mcs_init(struct rdp_mcs* self, struct stream* s)
{
rdp_iso_init(self->iso_layer, s);
s_push_layer(s, mcs_hdr, 8);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_mcs_send(struct rdp_mcs* self, struct stream* s)
{
int len;
s_pop_layer(s, mcs_hdr);
len = (s->end - s->p) - 8;
len = len | 0x8000;
out_uint8(s, MCS_SDRQ << 2);
out_uint16_be(s, self->userid);
out_uint16_be(s, MCS_GLOBAL_CHANNEL);
out_uint8(s, 0x70);
out_uint16_be(s, len);
if (rdp_iso_send(self->iso_layer, s) != 0)
{
return 1;
}
return 0;
}
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