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229 lines
7.2 KiB
229 lines
7.2 KiB
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005-2008
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*/
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/**
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*
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* @file scp_v1.c
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* @brief scp version 1 implementation
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* @author Jay Sorg, Simone Fedele
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*
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*/
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#include "sesman.h"
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//#include "libscp_types.h"
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#include "libscp.h"
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extern struct config_sesman* g_cfg; /* in sesman.c */
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static void parseCommonStates(enum SCP_SERVER_STATES_E e, char* f);
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/******************************************************************************/
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void DEFAULT_CC
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scp_v1_process(struct SCP_CONNECTION* c, struct SCP_SESSION* s)
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{
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long data;
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int display;
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int retries;
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int current_try;
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enum SCP_SERVER_STATES_E e;
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struct SCP_DISCONNECTED_SESSION* slist;
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struct session_item* sitem;
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int scount;
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SCP_SID sid;
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retries = g_cfg->sec.login_retry;
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current_try = retries;
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data = auth_userpass(s->username, s->password);
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/*LOG_DBG("user: %s\npass: %s", s->username, s->password);*/
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while ((!data) && ((retries == 0) || (current_try > 0)))
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{
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LOG_DBG(&(g_cfg->log), "data %d - retry %d - currenttry %d - expr %d", data, retries, current_try, ((!data) && ((retries==0) || (current_try>0))));
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e=scp_v1s_request_password(c,s,"Wrong username and/or password");
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switch (e)
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{
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case SCP_SERVER_STATE_OK:
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/* all ok, we got new username and password */
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data = auth_userpass(s->username, s->password);
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/* one try less */
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if (current_try > 0)
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{
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current_try--;
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}
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break;
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default:
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/* we check the other errors */
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parseCommonStates(e, "scp_v1s_list_sessions()");
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scp_session_destroy(s);
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return;
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//break;
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}
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}
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if (!data)
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{
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scp_v1s_deny_connection(c, "Login failed");
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log_message(&(g_cfg->log), LOG_LEVEL_INFO,
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"Login failed for user %s. Connection terminated", s->username);
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scp_session_destroy(s);
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return;
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}
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/* testing if login is allowed*/
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if (0 == access_login_allowed(s->username))
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{
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scp_v1s_deny_connection(c, "Access to Terminal Server not allowed.");
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log_message(&(g_cfg->log), LOG_LEVEL_INFO,
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"User %s not allowed on TS. Connection terminated", s->username);
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scp_session_destroy(s);
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return;
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}
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//check if we need password change
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/* list disconnected sessions */
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slist = session_get_byuser(s->username, &scount, SESMAN_SESSION_STATUS_DISCONNECTED);
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if (scount == 0)
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{
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/* no disconnected sessions - start a new one */
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if (0 != s->client_ip)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "++ created session (access granted): username %s, ip %s", s->username, s->client_ip);
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "++ created session (access granted): username %s", s->username);
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}
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if (SCP_SESSION_TYPE_XVNC == s->type)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "starting Xvnc session...");
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display = session_start(s->width, s->height, s->bpp, s->username,
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s->password, data, SESMAN_SESSION_TYPE_XVNC,
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s->domain, s->program, s->directory, s->client_ip);
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "starting X11rdp session...");
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display = session_start(s->width, s->height, s->bpp, s->username,
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s->password, data, SESMAN_SESSION_TYPE_XRDP,
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s->domain, s->program, s->directory, s->client_ip);
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}
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e = scp_v1s_connect_new_session(c, display);
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switch (e)
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{
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case SCP_SERVER_STATE_OK:
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/* all ok, we got new username and password */
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break;
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default:
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/* we check the other errors */
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parseCommonStates(e, "scp_v1s_connect_new_session()");
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break;
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}
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}
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else
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{
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/* one or more disconnected sessions - listing */
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e = scp_v1s_list_sessions(c, scount, slist, &sid);
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switch (e)
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{
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/*case SCP_SERVER_STATE_FORCE_NEW:*/
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/* we should check for MaxSessions */
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case SCP_SERVER_STATE_SELECTION_CANCEL:
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "Connection cancelled after session listing");
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break;
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case SCP_SERVER_STATE_OK:
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/* ok, reconnecting... */
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sitem=session_get_bypid(sid);
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if (0==sitem)
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{
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e=scp_v1s_connection_error(c, "Internal error");
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "Cannot find session item on the chain");
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}
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else
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{
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display=sitem->display;
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/*e=scp_v1s_reconnect_session(c, sitem, display);*/
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e=scp_v1s_reconnect_session(c, display);
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if (0 != s->client_ip)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "++ reconnected session: username %s, display :%d.0, session_pid %d, ip %s", s->username, display, sitem->pid, s->client_ip);
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "++ reconnected session: username %s, display :%d.0, session_pid %d", s->username, display, sitem->pid);
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}
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g_free(sitem);
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}
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break;
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default:
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/* we check the other errors */
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parseCommonStates(e, "scp_v1s_list_sessions()");
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break;
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}
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g_free(slist);
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}
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/* resource management */
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if ((e == SCP_SERVER_STATE_OK) && (s->rsr))
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{
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/* here goes scp resource sharing code */
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}
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/* cleanup */
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scp_session_destroy(s);
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auth_end(data);
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}
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static void parseCommonStates(enum SCP_SERVER_STATES_E e, char* f)
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{
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switch (e)
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{
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case SCP_SERVER_STATE_VERSION_ERR:
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LOG_DBG(&(g_cfg->log), "version error")
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case SCP_SERVER_STATE_SIZE_ERR:
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/* an unknown scp version was requested, so we shut down the */
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/* connection (and log the fact) */
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log_message(&(g_cfg->log), LOG_LEVEL_WARNING,
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"protocol violation. connection closed.");
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break;
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case SCP_SERVER_STATE_NETWORK_ERR:
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log_message(&(g_cfg->log), LOG_LEVEL_WARNING, "libscp network error.");
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break;
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case SCP_SERVER_STATE_SEQUENCE_ERR:
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log_message(&(g_cfg->log), LOG_LEVEL_WARNING, "libscp sequence error.");
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break;
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case SCP_SERVER_STATE_INTERNAL_ERR:
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/* internal error occurred (eg. malloc() error, ecc.) */
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "libscp internal error occurred.");
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break;
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default:
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/* dummy: scp_v1s_request_password won't generate any other */
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/* error other than the ones before */
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "unknown return from %s", f);
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break;
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}
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}
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