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xrdp-proprietary/sesman/libscp/libscp_v1c.c

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2012
*
* 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.
*/
/**
*
* @file libscp_v1c.c
* @brief libscp version 1 client api code
* @author Simone Fedele
*
*/
#include "libscp_v1c.h"
#include <stdlib.h>
#include <stdio.h>
static enum SCP_CLIENT_STATES_E
_scp_v1c_check_response(struct SCP_CONNECTION *c, struct SCP_SESSION *s);
/* client API */
/* 001 */
enum SCP_CLIENT_STATES_E
scp_v1c_connect(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
{
tui8 sz;
tui32 size;
init_stream(c->out_s, c->out_s->size);
init_stream(c->in_s, c->in_s->size);
size = 19 + 17 + 4 + g_strlen(s->hostname) + g_strlen(s->username) +
g_strlen(s->password);
if (s->addr_type == SCP_ADDRESS_TYPE_IPV4)
{
size = size + 4;
}
else
{
size = size + 16;
}
/* sending request */
/* header */
out_uint32_be(c->out_s, 1); /* version */
out_uint32_be(c->out_s, size);
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT);
out_uint16_be(c->out_s, 1);
/* body */
out_uint8(c->out_s, s->type);
out_uint16_be(c->out_s, s->height);
out_uint16_be(c->out_s, s->width);
out_uint8(c->out_s, s->bpp);
out_uint8(c->out_s, s->rsr);
out_uint8p(c->out_s, s->locale, 17);
out_uint8(c->out_s, s->addr_type);
if (s->addr_type == SCP_ADDRESS_TYPE_IPV4)
{
out_uint32_be(c->out_s, s->ipv4addr);
}
else if (s->addr_type == SCP_ADDRESS_TYPE_IPV6)
{
out_uint8p(c->out_s, s->ipv6addr, 16);
}
sz = g_strlen(s->hostname);
out_uint8(c->out_s, sz);
out_uint8p(c->out_s, s->hostname, sz);
sz = g_strlen(s->username);
out_uint8(c->out_s, sz);
out_uint8p(c->out_s, s->username, sz);
sz = g_strlen(s->password);
out_uint8(c->out_s, sz);
out_uint8p(c->out_s, s->password, sz);
if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
/* wait for response */
return _scp_v1c_check_response(c, s);
}
/* 004 */
enum SCP_CLIENT_STATES_E
scp_v1c_resend_credentials(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
{
tui8 sz;
tui32 size;
init_stream(c->out_s, c->out_s->size);
init_stream(c->in_s, c->in_s->size);
size = 12 + 2 + g_strlen(s->username) + g_strlen(s->password);
/* sending request */
/* header */
out_uint32_be(c->out_s, 1); /* version */
out_uint32_be(c->out_s, size);
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT);
out_uint16_be(c->out_s, 4);
/* body */
sz = g_strlen(s->username);
out_uint8(c->out_s, sz);
out_uint8p(c->out_s, s->username, sz);
sz = g_strlen(s->password);
out_uint8(c->out_s, sz);
out_uint8p(c->out_s, s->password, sz);
if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
/* wait for response */
return _scp_v1c_check_response(c, s);
}
/* 041 */
enum SCP_CLIENT_STATES_E
scp_v1c_get_session_list(struct SCP_CONNECTION *c, int *scount,
struct SCP_DISCONNECTED_SESSION **s)
{
tui32 version = 1;
tui32 size = 12;
tui16 cmd = 41;
tui32 sescnt = 0; /* total session number */
tui32 sestmp = 0; /* additional total session number */
tui8 pktcnt = 0; /* packet session count */
tui32 totalcnt = 0; /* session counter */
tui8 continued = 0; /* continue flag */
int firstpkt = 1; /* "first packet" flag */
int idx;
struct SCP_DISCONNECTED_SESSION *ds = 0;
init_stream(c->out_s, c->out_s->size);
/* we request session list */
out_uint32_be(c->out_s, version); /* version */
out_uint32_be(c->out_s, size); /* size */
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
out_uint16_be(c->out_s, cmd); /* cmd */
if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
do
{
/* then we wait for server response */
init_stream(c->in_s, c->in_s->size);
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint32_be(c->in_s, version);
if (version != 1)
{
return SCP_CLIENT_STATE_VERSION_ERR;
}
in_uint32_be(c->in_s, size);
if (size < 12)
{
return SCP_CLIENT_STATE_SIZE_ERR;
}
init_stream(c->in_s, c->in_s->size);
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd != SCP_COMMAND_SET_DEFAULT)
{
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd != 42)
{
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
if (firstpkt)
{
firstpkt = 0;
in_uint32_be(c->in_s, sescnt);
sestmp = sescnt;
ds = g_new(struct SCP_DISCONNECTED_SESSION, sescnt);
if (ds == 0)
{
return SCP_CLIENT_STATE_INTERNAL_ERR;
}
}
else
{
in_uint32_be(c->in_s, sestmp);
}
in_uint8(c->in_s, continued);
in_uint8(c->in_s, pktcnt);
for (idx = 0; idx < pktcnt; idx++)
{
in_uint32_be(c->in_s, (ds[totalcnt]).SID); /* session id */
in_uint8(c->in_s, (ds[totalcnt]).type);
in_uint16_be(c->in_s, (ds[totalcnt]).height);
in_uint16_be(c->in_s, (ds[totalcnt]).width);
in_uint8(c->in_s, (ds[totalcnt]).bpp);
in_uint8(c->in_s, (ds[totalcnt]).idle_days);
in_uint8(c->in_s, (ds[totalcnt]).idle_hours);
in_uint8(c->in_s, (ds[totalcnt]).idle_minutes);
in_uint16_be(c->in_s, (ds[totalcnt]).conn_year);
in_uint8(c->in_s, (ds[totalcnt]).conn_month);
in_uint8(c->in_s, (ds[totalcnt]).conn_day);
in_uint8(c->in_s, (ds[totalcnt]).conn_hour);
in_uint8(c->in_s, (ds[totalcnt]).conn_minute);
in_uint8(c->in_s, (ds[totalcnt]).addr_type);
if ((ds[totalcnt]).addr_type == SCP_ADDRESS_TYPE_IPV4)
{
in_uint32_be(c->in_s, (ds[totalcnt]).ipv4addr);
}
else if ((ds[totalcnt]).addr_type == SCP_ADDRESS_TYPE_IPV6)
{
in_uint8a(c->in_s, (ds[totalcnt]).ipv6addr, 16);
}
totalcnt++;
}
}
while (continued);
printf("fine\n");
/* return data... */
(*scount) = sescnt;
(*s) = ds;
return SCP_CLIENT_STATE_LIST_OK;
}
/* 043 */
enum SCP_CLIENT_STATES_E
scp_v1c_select_session(struct SCP_CONNECTION *c, struct SCP_SESSION *s,
SCP_SID sid)
{
tui32 version = 1;
tui32 size = 16;
tui16 cmd = 43;
init_stream(c->out_s, c->out_s->size);
/* sending our selection */
out_uint32_be(c->out_s, version); /* version */
out_uint32_be(c->out_s, size); /* size */
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
out_uint16_be(c->out_s, cmd); /* cmd */
out_uint32_be(c->out_s, sid);
if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
/* waiting for response.... */
init_stream(c->in_s, c->in_s->size);
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint32_be(c->in_s, version);
if (version != 1)
{
return SCP_CLIENT_STATE_VERSION_ERR;
}
in_uint32_be(c->in_s, size);
if (size < 12)
{
return SCP_CLIENT_STATE_SIZE_ERR;
}
init_stream(c->in_s, c->in_s->size);
/* read the rest of the packet */
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd != SCP_COMMAND_SET_DEFAULT)
{
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd != 46)
{
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
/* session display */
in_uint16_be(c->in_s, (s->display));
/*we don't need to return any data other than the display */
/*because we already sent that */
return SCP_CLIENT_STATE_OK;
}
/* 044 */
enum SCP_CLIENT_STATES_E
scp_v1c_select_session_cancel(struct SCP_CONNECTION *c)
{
tui32 version = 1;
tui32 size = 12;
tui16 cmd = 44;
init_stream(c->out_s, c->out_s->size);
/* sending our selection */
out_uint32_be(c->out_s, version); /* version */
out_uint32_be(c->out_s, size); /* size */
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
out_uint16_be(c->out_s, cmd); /* cmd */
if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
return SCP_CLIENT_STATE_END;
}
static enum SCP_CLIENT_STATES_E
_scp_v1c_check_response(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
{
tui32 version;
tui32 size;
tui16 cmd;
tui16 dim;
init_stream(c->in_s, c->in_s->size);
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint32_be(c->in_s, version);
if (version != 1)
{
return SCP_CLIENT_STATE_VERSION_ERR;
}
in_uint32_be(c->in_s, size);
init_stream(c->in_s, c->in_s->size);
/* read the rest of the packet */
if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
{
return SCP_CLIENT_STATE_NETWORK_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd != SCP_COMMAND_SET_DEFAULT)
{
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
in_uint16_be(c->in_s, cmd);
if (cmd == 2) /* connection denied */
{
in_uint16_be(c->in_s, dim);
if (s->errstr != 0)
{
g_free(s->errstr);
}
s->errstr = g_new(char, dim + 1);
if (s->errstr == 0)
{
return SCP_CLIENT_STATE_INTERNAL_ERR;
}
in_uint8a(c->in_s, s->errstr, dim);
(s->errstr)[dim] = '\0';
return SCP_CLIENT_STATE_CONNECTION_DENIED;
}
else if (cmd == 3) /* resend usr/pwd */
{
in_uint16_be(c->in_s, dim);
if (s->errstr != 0)
{
g_free(s->errstr);
}
s->errstr = g_new(char, dim + 1);
if (s->errstr == 0)
{
return SCP_CLIENT_STATE_INTERNAL_ERR;
}
in_uint8a(c->in_s, s->errstr, dim);
(s->errstr)[dim] = '\0';
return SCP_CLIENT_STATE_RESEND_CREDENTIALS;
}
else if (cmd == 20) /* password change */
{
in_uint16_be(c->in_s, dim);
if (s->errstr != 0)
{
g_free(s->errstr);
}
s->errstr = g_new(char, dim + 1);
if (s->errstr == 0)
{
return SCP_CLIENT_STATE_INTERNAL_ERR;
}
in_uint8a(c->in_s, s->errstr, dim);
(s->errstr)[dim] = '\0';
return SCP_CLIENT_STATE_PWD_CHANGE_REQ;
}
else if (cmd == 30) /* display */
{
in_uint16_be(c->in_s, s->display);
return SCP_CLIENT_STATE_OK;
}
//else if (cmd == 31) /* there's a disconnected session */
//{
// return SCP_CLIENT_STATE_RECONNECT_SINGLE;
//}
//else if (cmd == 33) /* display of a disconnected session */
//{
// return SCP_CLIENT_STATE_RECONNECT;
//}
else if (cmd == 40) /* session list */
{
return SCP_CLIENT_STATE_SESSION_LIST;
}
return SCP_CLIENT_STATE_SEQUENCE_ERR;
}
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