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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 2004-2005
iso layer
*/
#include "libxrdp.h"
/*****************************************************************************/
struct xrdp_iso* APP_CC
xrdp_iso_create(struct xrdp_mcs* owner, int sck)
{
struct xrdp_iso* self;
self = (struct xrdp_iso*)g_malloc(sizeof(struct xrdp_iso), 1);
self->mcs_layer = owner;
self->tcp_layer = xrdp_tcp_create(self, sck);
return self;
}
/*****************************************************************************/
void APP_CC
xrdp_iso_delete(struct xrdp_iso* self)
{
if (self == 0)
{
return;
}
xrdp_tcp_delete(self->tcp_layer);
g_free(self);
}
/*****************************************************************************/
/* returns error */
static int APP_CC
xrdp_iso_recv_msg(struct xrdp_iso* self, struct stream* s, int* code)
{
int ver;
int len;
*code = 0;
if (xrdp_tcp_recv(self->tcp_layer, s, 4) != 0)
{
return 1;
}
in_uint8(s, ver);
if (ver != 3)
{
return 1;
}
in_uint8s(s, 1);
in_uint16_be(s, len);
if (xrdp_tcp_recv(self->tcp_layer, s, len - 4) != 0)
{
return 1;
}
in_uint8s(s, 1);
in_uint8(s, *code);
if (*code == ISO_PDU_DT)
{
in_uint8s(s, 1);
}
else
{
in_uint8s(s, 5);
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_iso_recv(struct xrdp_iso* self, struct stream* s)
{
int code;
DEBUG((" in xrdp_iso_recv\r\n"));
if (xrdp_iso_recv_msg(self, s, &code) != 0)
{
DEBUG((" out xrdp_iso_recv xrdp_iso_recv_msg return non zero\r\n"));
return 1;
}
if (code != ISO_PDU_DT)
{
DEBUG((" out xrdp_iso_recv code != ISO_PDU_DT\r\n"));
return 1;
}
DEBUG((" out xrdp_iso_recv\r\n"));
return 0;
}
/*****************************************************************************/
static int APP_CC
xrdp_iso_send_msg(struct xrdp_iso* self, struct stream* s, int code)
{
if (xrdp_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, 8);
out_uint8(s, code);
out_uint16_le(s, 0);
out_uint16_le(s, 0);
out_uint8(s, 0);
s_mark_end(s);
if (xrdp_tcp_send(self->tcp_layer, s) != 0)
{
return 1;
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_iso_incoming(struct xrdp_iso* self)
{
int code;
struct stream* s;
make_stream(s);
init_stream(s, 8192);
DEBUG((" in xrdp_iso_incoming\r\n"));
if (xrdp_iso_recv_msg(self, s, &code) != 0)
{
free_stream(s);
return 1;
}
if (code != ISO_PDU_CR)
{
free_stream(s);
return 1;
}
if (xrdp_iso_send_msg(self, s, ISO_PDU_CC) != 0)
{
free_stream(s);
return 1;
}
DEBUG((" out xrdp_iso_incoming\r\n"));
free_stream(s);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_iso_init(struct xrdp_iso* self, struct stream* s)
{
xrdp_tcp_init(self->tcp_layer, s);
s_push_layer(s, iso_hdr, 7);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_iso_send(struct xrdp_iso* self, struct stream* s)
{
int len;
DEBUG((" in xrdp_iso_send\r\n"));
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 (xrdp_tcp_send(self->tcp_layer, s) != 0)
{
return 1;
}
DEBUG((" out xrdp_iso_send\r\n"));
return 0;
}
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