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added xrdp_mcs.c

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ulab-original
jsorg71 20 years ago
parent b7060e8a4a
commit 12ed9b1002
1 changed files with 401 additions and 0 deletions
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xrdp/xrdp_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.
Copyright (C) Jay Sorg 2004
mcs layer
*/
#include "xrdp.h"
/*****************************************************************************/
struct xrdp_mcs* xrdp_mcs_create(struct xrdp_sec* owner)
{
struct xrdp_mcs* self;
self = (struct xrdp_mcs*)g_malloc(sizeof(struct xrdp_mcs), 1);
self->owner = owner;
self->in_s = owner->in_s;
self->out_s = owner->out_s;
self->userid = 1;
self->chanid = 1001;
self->client_mcs_data = &owner->client_mcs_data;
self->server_mcs_data = &owner->server_mcs_data;
self->iso_layer = xrdp_iso_create(self);
return self;
}
/*****************************************************************************/
void xrdp_mcs_delete(struct xrdp_mcs* self)
{
xrdp_iso_delete(self->iso_layer);
g_free(self);
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_recv(struct xrdp_mcs* self)
{
int appid;
int opcode;
int len;
if (xrdp_iso_recv(self->iso_layer) != 0)
return 1;
in_uint8(self->in_s, opcode);
appid = opcode >> 2;
if (appid != MCS_SDRQ)
return 1;
in_uint8s(self->in_s, 5);
in_uint8(self->in_s, len);
if (len & 0x80)
in_uint8s(self->in_s, 1);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_ber_parse_header(struct xrdp_mcs* self, int tag_val, int* len)
{
int tag;
int l;
if (tag_val > 0xff)
{
in_uint16_be(self->in_s, tag);
}
else
{
in_uint8(self->in_s, tag);
}
if (tag != tag_val)
return 1;
in_uint8(self->in_s, l);
if (l & 0x80)
{
l = l & ~0x80;
*len = 0;
while (l > 0)
{
next_be(self->in_s, *len);
l--;
}
}
else
*len = l;
if (s_check(self->in_s))
return 0;
else
return 1;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_parse_domain_params(struct xrdp_mcs* self)
{
int len;
if (xrdp_mcs_ber_parse_header(self, MCS_TAG_DOMAIN_PARAMS, &len) != 0)
return 1;
in_uint8s(self->in_s, len);
if (s_check(self->in_s))
return 0;
else
return 1;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_recv_connect_initial(struct xrdp_mcs* self)
{
int len;
if (xrdp_iso_recv(self->iso_layer) != 0)
return 1;
if (xrdp_mcs_ber_parse_header(self, MCS_CONNECT_INITIAL, &len) != 0)
return 1;
if (xrdp_mcs_ber_parse_header(self, BER_TAG_OCTET_STRING, &len) != 0)
return 1;
in_uint8s(self->in_s, len);
if (xrdp_mcs_ber_parse_header(self, BER_TAG_OCTET_STRING, &len) != 0)
return 1;
in_uint8s(self->in_s, len);
if (xrdp_mcs_ber_parse_header(self, BER_TAG_BOOLEAN, &len) != 0)
return 1;
in_uint8s(self->in_s, len);
if (xrdp_mcs_parse_domain_params(self) != 0)
return 1;
if (xrdp_mcs_parse_domain_params(self) != 0)
return 1;
if (xrdp_mcs_parse_domain_params(self) != 0)
return 1;
if (xrdp_mcs_ber_parse_header(self, BER_TAG_OCTET_STRING, &len) != 0)
return 1;
/* make a copy of client mcs data */
init_stream(self->client_mcs_data, len);
out_uint8a(self->client_mcs_data, self->in_s->p, len);
in_uint8s(self->in_s, len);
s_mark_end(self->client_mcs_data);
if (s_check_end(self->in_s))
return 0;
else
return 1;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_recv_edrq(struct xrdp_mcs* self)
{
int opcode;
if (xrdp_iso_recv(self->iso_layer) != 0)
return 1;
in_uint8(self->in_s, opcode);
if ((opcode >> 2) != MCS_EDRQ)
return 1;
in_uint8s(self->in_s, 2);
in_uint8s(self->in_s, 2);
if (opcode & 2)
{
in_uint16_be(self->in_s, self->userid);
}
if (!(s_check_end(self->in_s)))
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_recv_aurq(struct xrdp_mcs* self)
{
int opcode;
if (xrdp_iso_recv(self->iso_layer) != 0)
return 1;
in_uint8(self->in_s, opcode);
if ((opcode >> 2) != MCS_AURQ)
return 1;
if (opcode & 2)
{
in_uint16_be(self->in_s, self->userid);
}
if (!(s_check_end(self->in_s)))
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_send_aucf(struct xrdp_mcs* self)
{
if (xrdp_iso_init(self->iso_layer, 4) != 0)
return 1;
out_uint8(self->out_s, (MCS_AUCF << 2) | 2);
out_uint8s(self->out_s, 1);
out_uint16_be(self->out_s, self->userid);
s_mark_end(self->out_s);
if (xrdp_iso_send(self->iso_layer) != 0)
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_recv_cjrq(struct xrdp_mcs* self)
{
int opcode;
if (xrdp_iso_recv(self->iso_layer) != 0)
return 1;
in_uint8(self->in_s, opcode);
if ((opcode >> 2) != MCS_CJRQ)
return 1;
in_uint8s(self->in_s, 4);
if (opcode & 2)
{
in_uint8s(self->in_s, 2);
}
if (!(s_check_end(self->in_s)))
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_send_cjcf(struct xrdp_mcs* self, int chanid)
{
if (xrdp_iso_init(self->iso_layer, 8) != 0)
return 1;
out_uint8(self->out_s, (MCS_CJCF << 2) | 2);
out_uint8(self->out_s, 0);
out_uint16_be(self->out_s, self->userid);
out_uint16_be(self->out_s, chanid);
out_uint16_be(self->out_s, chanid);
s_mark_end(self->out_s);
if (xrdp_iso_send(self->iso_layer) != 0)
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_ber_out_header(struct xrdp_mcs* self, int tag_val, int len)
{
if (tag_val > 0xff)
{
out_uint16_be(self->out_s, tag_val);
}
else
{
out_uint8(self->out_s, tag_val);
}
if (len >= 0x80)
{
out_uint8(self->out_s, 0x82);
out_uint16_be(self->out_s, len);
}
else
{
out_uint8(self->out_s, len);
}
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_ber_out_int8(struct xrdp_mcs* self, int value)
{
xrdp_mcs_ber_out_header(self, BER_TAG_INTEGER, 1);
out_uint8(self->out_s, value);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_ber_out_int16(struct xrdp_mcs* self, int value)
{
xrdp_mcs_ber_out_header(self, BER_TAG_INTEGER, 2);
out_uint8(self->out_s, value >> 8);
out_uint8(self->out_s, value);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_ber_out_int24(struct xrdp_mcs* self, int value)
{
xrdp_mcs_ber_out_header(self, BER_TAG_INTEGER, 3);
out_uint8(self->out_s, value >> 16);
out_uint8(self->out_s, value >> 8);
out_uint8(self->out_s, value);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_out_domain_params(struct xrdp_mcs* self, int max_channels,
int max_users, int max_tokens,
int max_pdu_size)
{
xrdp_mcs_ber_out_header(self, MCS_TAG_DOMAIN_PARAMS, 26);
xrdp_mcs_ber_out_int8(self, max_channels);
xrdp_mcs_ber_out_int8(self, max_users);
xrdp_mcs_ber_out_int8(self, max_tokens);
xrdp_mcs_ber_out_int8(self, 1);
xrdp_mcs_ber_out_int8(self, 0);
xrdp_mcs_ber_out_int8(self, 1);
xrdp_mcs_ber_out_int24(self, max_pdu_size);
xrdp_mcs_ber_out_int8(self, 2);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_send_connect_response(struct xrdp_mcs* self)
{
int data_len;
data_len = self->server_mcs_data->end - self->server_mcs_data->data;
xrdp_iso_init(self->iso_layer, 512);
xrdp_mcs_ber_out_header(self, MCS_CONNECT_RESPONSE, 313);
xrdp_mcs_ber_out_header(self, BER_TAG_RESULT, 1);
out_uint8(self->out_s, 0);
xrdp_mcs_ber_out_header(self, BER_TAG_INTEGER, 1);
out_uint8(self->out_s, 0);
xrdp_mcs_out_domain_params(self, 2, 2, 0, 0xffff);
xrdp_mcs_ber_out_header(self, BER_TAG_OCTET_STRING, data_len);
/* mcs data */
out_uint8a(self->out_s, self->server_mcs_data->data, data_len);
s_mark_end(self->out_s);
if (xrdp_iso_send(self->iso_layer) != 0)
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_incoming(struct xrdp_mcs* self)
{
if (xrdp_iso_incoming(self->iso_layer) != 0)
return 1;
if (xrdp_mcs_recv_connect_initial(self) != 0)
return 1;
if (xrdp_mcs_send_connect_response(self) != 0)
return 1;
if (xrdp_mcs_recv_edrq(self) != 0)
return 1;
if (xrdp_mcs_recv_aurq(self) != 0)
return 1;
if (xrdp_mcs_send_aucf(self) != 0)
return 1;
if (xrdp_mcs_recv_cjrq(self) != 0)
return 1;
if (xrdp_mcs_send_cjcf(self, self->userid + MCS_USERCHANNEL_BASE) != 0)
return 1;
if (xrdp_mcs_recv_cjrq(self) != 0)
return 1;
if (xrdp_mcs_send_cjcf(self, MCS_GLOBAL_CHANNEL) != 0)
return 1;
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_init(struct xrdp_mcs* self, int len)
{
xrdp_iso_init(self->iso_layer, len + 8);
s_push_layer(self->out_s, mcs_hdr, 8);
return 0;
}
/*****************************************************************************/
/* returns error */
int xrdp_mcs_send(struct xrdp_mcs* self)
{
int len;
s_pop_layer(self->out_s, mcs_hdr);
len = (self->out_s->end - self->out_s->p) - 8;
len = len | 0x8000;
out_uint8(self->out_s, MCS_SDIN << 2);
out_uint16_be(self->out_s, self->userid);
out_uint16_be(self->out_s, MCS_GLOBAL_CHANNEL);
out_uint8(self->out_s, 0x70);
out_uint16_be(self->out_s, len);
if (xrdp_iso_send(self->iso_layer) != 0)
return 1;
return 0;
}
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