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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2015
*
* 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 scp.c
* @brief scp (sesman control protocol) common code
* scp (sesman control protocol) common code
* This code controls which version is being used and starts the
* appropriate process
* @author Jay Sorg, Simone Fedele
*
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include "sesman.h"
extern struct config_sesman *g_cfg; /* in sesman.c */
/******************************************************************************/
enum SCP_SERVER_STATES_E
scp_process(struct trans *t, struct SCP_SESSION *sdata)
{
enum SCP_SERVER_STATES_E result = scp_vXs_accept(t, sdata);
switch (result)
{
case SCP_SERVER_STATE_OK:
if (sdata->version == 0)
{
/* starts processing an scp v0 connection */
LOG_DEVEL(LOG_LEVEL_DEBUG, "accept ok, go on with scp v0");
result = scp_v0_process(t, sdata);
}
else
{
LOG_DEVEL(LOG_LEVEL_DEBUG, "accept ok, go on with scp v1");
result = scp_v1_process(t, sdata);
}
break;
case SCP_SERVER_STATE_START_MANAGE:
/* starting a management session */
LOG(LOG_LEVEL_INFO,
"starting a sesman management session...");
result = scp_v1_mng_process_msg(t, sdata);
break;
case SCP_SERVER_STATE_VERSION_ERR:
case SCP_SERVER_STATE_SIZE_ERR:
/* an unknown scp version was requested, or the message sizes
are inconsistent. Shut down the connection and log the
fact */
LOG(LOG_LEVEL_WARNING,
"protocol violation. connection refused.");
break;
case SCP_SERVER_STATE_NETWORK_ERR:
LOG(LOG_LEVEL_WARNING, "libscp network error.");
break;
case SCP_SERVER_STATE_SEQUENCE_ERR:
LOG(LOG_LEVEL_WARNING, "libscp sequence error.");
break;
case SCP_SERVER_STATE_INTERNAL_ERR:
/* internal error occurred (eg. malloc() error, ecc.) */
LOG(LOG_LEVEL_ERROR, "libscp internal error occurred.");
break;
default:
LOG(LOG_LEVEL_ALWAYS, "unknown return from scp_vXs_accept()");
result = SCP_SERVER_STATE_INTERNAL_ERR;
break;
}
return result;
}
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