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xrdp-proprietary/rdp/rdp_iso.c

240 lines
5.2 KiB

/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2013
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* librdp iso layer
*/
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#include "rdp.h"
/*****************************************************************************/
struct rdp_iso *APP_CC
rdp_iso_create(struct rdp_mcs *owner)
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{
struct rdp_iso *self;
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self = (struct rdp_iso *)g_malloc(sizeof(struct rdp_iso), 1);
self->mcs_layer = owner;
self->tcp_layer = rdp_tcp_create(self);
return self;
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}
/*****************************************************************************/
void APP_CC
rdp_iso_delete(struct rdp_iso *self)
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{
if (self == 0)
{
return;
}
rdp_tcp_delete(self->tcp_layer);
g_free(self);
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}
/*****************************************************************************/
/* returns error */
static int APP_CC
rdp_iso_recv_msg(struct rdp_iso *self, struct stream *s, int *code)
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{
int ver;
int len;
*code = 0;
if (rdp_tcp_recv(self->tcp_layer, s, 4) != 0)
{
DEBUG((" out rdp_iso_recv_msg error rdp_tcp_recv 1 failed"));
return 1;
}
in_uint8(s, ver);
if (ver != 3)
{
DEBUG((" out rdp_iso_recv_msg error ver != 3"));
return 1;
}
in_uint8s(s, 1);
in_uint16_be(s, len);
if (rdp_tcp_recv(self->tcp_layer, s, len - 4) != 0)
{
DEBUG((" out rdp_iso_recv_msg error rdp_tcp_recv 2 failed"));
return 1;
}
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in_uint8s(s, 1);
in_uint8(s, *code);
if (*code == ISO_PDU_DT)
{
in_uint8s(s, 1);
}
else
{
in_uint8s(s, 5);
}
return 0;
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}
/*****************************************************************************/
static int APP_CC
rdp_iso_send_msg(struct rdp_iso *self, struct stream *s, int code)
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{
if (rdp_tcp_init(self->tcp_layer, s) != 0)
{
return 1;
}
out_uint8(s, 3);
out_uint8(s, 0);
out_uint16_be(s, 11); /* length */
out_uint8(s, 6);
out_uint8(s, code);
out_uint16_le(s, 0);
out_uint16_le(s, 0);
out_uint8(s, 0);
s_mark_end(s);
if (rdp_tcp_send(self->tcp_layer, s) != 0)
{
return 1;
}
return 0;
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}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_iso_recv(struct rdp_iso *self, struct stream *s)
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{
int code;
if (rdp_iso_recv_msg(self, s, &code) != 0)
{
return 1;
}
if (code != ISO_PDU_DT)
{
return 1;
}
return 0;
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}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_iso_init(struct rdp_iso *self, struct stream *s)
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{
rdp_tcp_init(self->tcp_layer, s);
s_push_layer(s, iso_hdr, 7);
return 0;
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}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_iso_send(struct rdp_iso *self, struct stream *s)
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{
int len;
s_pop_layer(s, iso_hdr);
len = s->end - s->p;
out_uint8(s, 3);
out_uint8(s, 0);
out_uint16_be(s, len);
out_uint8(s, 2);
out_uint8(s, ISO_PDU_DT);
out_uint8(s, 0x80);
if (rdp_tcp_send(self->tcp_layer, s) != 0)
{
return 1;
}
return 0;
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}
/*****************************************************************************/
/* returns error */
int APP_CC
rdp_iso_connect(struct rdp_iso *self, char *ip, char *port)
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{
int code;
struct stream *s;
DEBUG((" in rdp_iso_connect"));
make_stream(s);
init_stream(s, 8192);
if (rdp_tcp_connect(self->tcp_layer, ip, port) != 0)
{
free_stream(s);
DEBUG((" out rdp_iso_connect error rdp_tcp_connect failed"));
return 1;
}
if (rdp_iso_send_msg(self, s, ISO_PDU_CR) != 0)
{
free_stream(s);
rdp_tcp_disconnect(self->tcp_layer);
DEBUG((" out rdp_iso_connect error rdp_iso_send_msg failed"));
return 1;
}
init_stream(s, 8192);
if (rdp_iso_recv_msg(self, s, &code) != 0)
{
free_stream(s);
rdp_tcp_disconnect(self->tcp_layer);
DEBUG((" out rdp_iso_connect error rdp_iso_recv_msg failed"));
return 1;
}
if (code != ISO_PDU_CC)
{
free_stream(s);
rdp_tcp_disconnect(self->tcp_layer);
DEBUG((" out rdp_iso_connect error code != ISO_PDU_CC"));
return 1;
}
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free_stream(s);
DEBUG((" out rdp_iso_connect"));
return 0;
}
/*****************************************************************************/
int APP_CC
rdp_iso_disconnect(struct rdp_iso *self)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
rdp_iso_send_msg(self, s, ISO_PDU_DR);
rdp_tcp_disconnect(self->tcp_layer);
free_stream(s);
return 0;
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}