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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 2005-2007
*/
/**
*
* @file scp_v1.c
* @brief scp version 1 implementation
* @author Jay Sorg, Simone Fedele
*
*/
#include "sesman.h"
//#include "libscp_types.h"
#include "libscp.h"
extern struct config_sesman g_cfg;
static void parseCommonStates(enum SCP_SERVER_STATES_E e, char* f);
/******************************************************************************/
void DEFAULT_CC
scp_v1_process(struct SCP_CONNECTION* c, struct SCP_SESSION* s)
{
long data;
int display;
int retries;
int current_try;
enum SCP_SERVER_STATES_E e;
struct SCP_DISCONNECTED_SESSION* slist;
struct session_item* sitem;
int scount;
SCP_SID sid;
retries = g_cfg.sec.login_retry;
current_try = retries;
data = auth_userpass(s->username, s->password);
/*LOG_DBG("user: %s\npass: %s", s->username, s->password);*/
while ((!data) && ((retries == 0) || (current_try > 0)))
{
LOG_DBG("data %d - retry %d - currenttry %d - expr %d", data, retries, current_try, ((!data) && ((retries==0) || (current_try>0))));
e=scp_v1s_request_password(c,s,"Wrong username and/or password");
switch (e)
{
case SCP_SERVER_STATE_OK:
/* all ok, we got new username and password */
data = auth_userpass(s->username, s->password);
/* one try less */
if (current_try > 0)
{
current_try--;
}
break;
default:
/* we check the other errors */
parseCommonStates(e, "scp_v1s_list_sessions()");
free_session(s);
return;
//break;
}
}
if (!data)
{
scp_v1s_deny_connection(c, "Login failed");
log_message(LOG_LEVEL_INFO,
"Login failed for user %s. Connection terminated", s->username);
free_session(s);
return;
}
/* testing if login is allowed*/
if (0 == access_login_allowed(s->username))
{
scp_v1s_deny_connection(c, "Access to Terminal Server not allowed.");
log_message(LOG_LEVEL_INFO,
"User %s not allowed on TS. Connection terminated", s->username);
free_session(s);
return;
}
//check if we need password change
/* list disconnected sessions */
slist = session_get_byuser(s->username, &scount);
if (scount == 0)
{
/* no disconnected sessions - start a new one */
log_message(LOG_LEVEL_INFO, "granted TS access to user %s", s->username);
if (SCP_SESSION_TYPE_XVNC == s->type)
{
log_message(LOG_LEVEL_INFO, "starting Xvnc session...");
display = session_start(s->width, s->height, s->bpp, s->username,
s->password, data, SESMAN_SESSION_TYPE_XVNC);
}
else
{
log_message(LOG_LEVEL_INFO, "starting Xrdp session...");
display = session_start(s->width, s->height, s->bpp, s->username,
s->password, data, SESMAN_SESSION_TYPE_XRDP);
}
e = scp_v1s_connect_new_session(c, display);
switch (e)
{
case SCP_SERVER_STATE_OK:
/* all ok, we got new username and password */
break;
default:
/* we check the other errors */
parseCommonStates(e, "scp_v1s_connect_new_session()");
break;
}
}
else
{
#warning FIXME session_get_by*() should return a malloc()ated struct
#warning FIXME or at least lock the chain
/* one or more disconnected sessions - listing */
e = scp_v1s_list_sessions(c, scount, slist, &sid);
switch (e)
{
/*case SCP_SERVER_STATE_FORCE_NEW:*/
/* we should check for MaxSessions */
case SCP_SERVER_STATE_SELECTION_CANCEL:
log_message(LOG_LEVEL_INFO, "Connection cancelled after session listing");
break;
case SCP_SERVER_STATE_OK:
/* ok, reconnecting... */
sitem=session_get_bypid(sid);
if (0==sitem)
{
e=scp_v1s_connection_error(c, "Internal error");
log_message(LOG_LEVEL_INFO, "Cannot find session item on the chain");
}
else
{
display=sitem->display;
/*e=scp_v1s_reconnect_session(c, sitem, display);*/
e=scp_v1s_reconnect_session(c, display);
log_message(LOG_LEVEL_INFO, "User %s reconnected to session %d on port %d", \
s->username, sitem->pid, display);
}
break;
default:
/* we check the other errors */
parseCommonStates(e, "scp_v1s_list_sessions()");
break;
}
g_free(slist);
}
/* resource management */
if ((e == SCP_SERVER_STATE_OK) && (s->rsr))
{
/* here goes scp resource sharing code */
}
/* cleanup */
free_session(s);
auth_end(data);
}
static void parseCommonStates(enum SCP_SERVER_STATES_E e, char* f)
{
switch (e)
{
case SCP_SERVER_STATE_VERSION_ERR:
LOG_DBG("version error", 0)
case SCP_SERVER_STATE_SIZE_ERR:
/* an unknown scp version was requested, so we shut down the */
/* connection (and log the fact) */
log_message(LOG_LEVEL_WARNING,
"protocol violation. connection closed.");
break;
case SCP_SERVER_STATE_NETWORK_ERR:
log_message(LOG_LEVEL_WARNING, "libscp network error.");
break;
case SCP_SERVER_STATE_SEQUENCE_ERR:
log_message(LOG_LEVEL_WARNING, "libscp sequence error.");
break;
case SCP_SERVER_STATE_INTERNAL_ERR:
/* internal error occurred (eg. malloc() error, ecc.) */
log_message(LOG_LEVEL_ERROR, "libscp internal error occurred.");
break;
default:
/* dummy: scp_v1s_request_password won't generate any other */
/* error other than the ones before */
log_message(LOG_LEVEL_ALWAYS, "unknown return from %s", f);
break;
}
}
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