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1 <?php
2 //$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/phplib/sess.inc,v 1.25 2006/11/05 18:26:05 dashley Exp $
3 //--------------------------------------------------------------------------------------------------------------
4 //sess.inc--FboPrime Session and Authentication Management Functions and Constants
5 //Copyright (C) 2006 David T. Ashley
6 //
7 //This program is free software; you can redistribute it and/or
8 //modify it under the terms of the GNU General Public License
9 //as published by the Free Software Foundation; either version 2
10 //of the License, or (at your option) any later version.
11 //
12 //This program is distributed in the hope that it will be useful,
13 //but WITHOUT ANY WARRANTY; without even the implied warranty of
14 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 //GNU General Public License for more details.
16 //
17 //You should have received a copy of the GNU General Public License
18 //along with this program; if not, write to the Free Software
19 //Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 //********************************************************************************
21 //Implement session and authentication functions.
22 //-------------------------------------------------------------------------------------------------
23 //Copyright 2006 David T. Ashley
24 //-------------------------------------------------------------------------------------------------
25 //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
26 //PUBLIC LICENSE, Version 3, full license text below.
27 //-------------------------------------------------------------------------------------------------
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571 //excuse you from the conditions of this License. If you cannot convey a
572 //covered work so as to satisfy simultaneously your obligations under this
573 //License and any other pertinent obligations, then as a consequence you may
574 //not convey it at all. For example, if you agree to terms that obligate you
575 //to collect a royalty for further conveying from those to whom you convey
576 //the Program, the only way you could satisfy both those terms and this
577 //License would be to refrain entirely from conveying the Program.
578 //
579 // 13. Use with the GNU Affero General Public License.
580 //
581 // Notwithstanding any other provision of this License, you have
582 //permission to link or combine any covered work with a work licensed
583 //under version 3 of the GNU Affero General Public License into a single
584 //combined work, and to convey the resulting work. The terms of this
585 //License will continue to apply to the part which is the covered work,
586 //but the special requirements of the GNU Affero General Public License,
587 //section 13, concerning interaction through a network will apply to the
588 //combination as such.
589 //
590 // 14. Revised Versions of this License.
591 //
592 // The Free Software Foundation may publish revised and/or new versions of
593 //the GNU General Public License from time to time. Such new versions will
594 //be similar in spirit to the present version, but may differ in detail to
595 //address new problems or concerns.
596 //
597 // Each version is given a distinguishing version number. If the
598 //Program specifies that a certain numbered version of the GNU General
599 //Public License "or any later version" applies to it, you have the
600 //option of following the terms and conditions either of that numbered
601 //version or of any later version published by the Free Software
602 //Foundation. If the Program does not specify a version number of the
603 //GNU General Public License, you may choose any version ever published
604 //by the Free Software Foundation.
605 //
606 // If the Program specifies that a proxy can decide which future
607 //versions of the GNU General Public License can be used, that proxy's
608 //public statement of acceptance of a version permanently authorizes you
609 //to choose that version for the Program.
610 //
611 // Later license versions may give you additional or different
612 //permissions. However, no additional obligations are imposed on any
613 //author or copyright holder as a result of your choosing to follow a
614 //later version.
615 //
616 // 15. Disclaimer of Warranty.
617 //
618 // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
619 //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
620 //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
621 //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
622 //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
623 //PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
624 //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
625 //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
626 //
627 // 16. Limitation of Liability.
628 //
629 // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
630 //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
631 //THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
632 //GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
633 //USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
634 //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
635 //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
636 //EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
637 //SUCH DAMAGES.
638 //
639 // 17. Interpretation of Sections 15 and 16.
640 //
641 // If the disclaimer of warranty and limitation of liability provided
642 //above cannot be given local legal effect according to their terms,
643 //reviewing courts shall apply local law that most closely approximates
644 //an absolute waiver of all civil liability in connection with the
645 //Program, unless a warranty or assumption of liability accompanies a
646 //copy of the Program in return for a fee.
647 //
648 // END OF TERMS AND CONDITIONS
649 //
650 // How to Apply These Terms to Your New Programs
651 //
652 // If you develop a new program, and you want it to be of the greatest
653 //possible use to the public, the best way to achieve this is to make it
654 //free software which everyone can redistribute and change under these terms.
655 //
656 // To do so, attach the following notices to the program. It is safest
657 //to attach them to the start of each source file to most effectively
658 //state the exclusion of warranty; and each file should have at least
659 //the "copyright" line and a pointer to where the full notice is found.
660 //
661 // <one line to give the program's name and a brief idea of what it does.>
662 // Copyright (C) <year> <name of author>
663 //
664 // This program is free software: you can redistribute it and/or modify
665 // it under the terms of the GNU General Public License as published by
666 // the Free Software Foundation, either version 3 of the License, or
667 // (at your option) any later version.
668 //
669 // This program is distributed in the hope that it will be useful,
670 // but WITHOUT ANY WARRANTY; without even the implied warranty of
671 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
672 // GNU General Public License for more details.
673 //
674 // You should have received a copy of the GNU General Public License
675 // along with this program. If not, see <http://www.gnu.org/licenses/>.
676 //
677 //Also add information on how to contact you by electronic and paper mail.
678 //
679 // If the program does terminal interaction, make it output a short
680 //notice like this when it starts in an interactive mode:
681 //
682 // <program> Copyright (C) <year> <name of author>
683 // This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
684 // This is free software, and you are welcome to redistribute it
685 // under certain conditions; type `show c' for details.
686 //
687 //The hypothetical commands `show w' and `show c' should show the appropriate
688 //parts of the General Public License. Of course, your program's commands
689 //might be different; for a GUI interface, you would use an "about box".
690 //
691 // You should also get your employer (if you work as a programmer) or school,
692 //if any, to sign a "copyright disclaimer" for the program, if necessary.
693 //For more information on this, and how to apply and follow the GNU GPL, see
694 //<http://www.gnu.org/licenses/>.
695 //
696 // The GNU General Public License does not permit incorporating your program
697 //into proprietary programs. If your program is a subroutine library, you
698 //may consider it more useful to permit linking proprietary applications with
699 //the library. If this is what you want to do, use the GNU Lesser General
700 //Public License instead of this License. But first, please read
701 //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
702 //-------------------------------------------------------------------------------------------------
703 //--------------------------------------------------------------------------------------------------------------
704 require_once("global.inc");
705 require_once("log.inc");
706 require_once("passwd.inc");
707 require_once("perm.inc");
708 require_once("sguid.inc");
709 require_once("sid.inc");
710 require_once("strfunc.inc");
711 require_once("usrs.inc");
712 require_once("utime.inc");
713 //
714 //--------------------------------------------------------------------------------------------------------------
715 //Constants for database storage, software internals, function parameters, and function return values of
716 //this module.
717 //
718 //Session reap time, in seconds. This is how old an inactive session must be in order to reap it by
719 //nightly cron job.
720 //
721 define("SESS_REAP_INACTIVE_TIME", 172800 ); //48 hours, in seconds.
722 //
723 //
724 //Function return values.
725 define("SESS_RCODE_SUCCESS", 0 ); //Successful action.
726 define("SESS_RCODE_SUCCESS_TEMP_PASSWORD", 1 ); //Authentication action was successful, but
727 //authentication was performed based on the
728 //temporary password. The user should be
729 //prompted to change their password as soon as
730 //possible.
731 define("SESS_RCODE_FAIL_USERID_EXPIRED_INACTIVE", 2 ); //Intended action failed because the userid
732 //and password specified authenticated
733 //properly, but the underlying userid is either
734 //expired or inactive. The user should be
735 //granted no privileges and instructed to contact
736 //the FBO.
737 define("SESS_RCODE_FAIL_USERID_NOEXIST", 3 ); //Intended action failed because specified
738 //userid does not exist.
739 define("SESS_RCODE_FAIL_PASSWD", 4 ); //Intended action failed because the password
740 //supplied was incorrect.
741 //
742 //Session constants for the logical page currently being visited.
743 //
744 define("SESS_LPAGE_UNDEFINED", 0); //Not yet defined or invalid SQL query
745 //result.
746 define("SESS_LPAGE_SCHEDDAYVIEW", 1); //Day view scheduler.
747 define("SESS_LPAGE_SCHEDWEEKVIEW", 2); //Week view scheduler.
748 define("SESS_LPAGE_SCHEDMONTHVIEW", 3); //Month view scheduler.
749 define("SESS_LPAGE_LOGRESOURCESCHEDULER", 4); //Log file viewing.
750 define("SESS_LPAGE_DBSTATS", 5); //Database statistics.
751 define("SESS_LPAGE_RESOURCELIST", 6); //Resource list (or all resources).
752 define("SESS_LPAGE_RESOURCERENUMBER", 7); //Resource list.
753 define("SESS_LPAGE_RESOURCEVIEW", 8); //Resource view (of individual resource).
754 define("SESS_LPAGE_RESOURCEEDIT", 9); //Resource edit (of individual resource).
755 define("SESS_LPAGE_RESOURCEADD", 10); //Resource edit (of individual resource).
756 define("SESS_LPAGE_USERSACTIVELIST", 11); //Users list (active).
757 define("SESS_LPAGE_USERSINACTIVELIST", 12); //Users list (active).
758 define("SESS_LPAGE_USERSVIEW", 13); //User view.
759 define("SESS_LPAGE_USERSEDIT", 14); //User edit.
760 define("SESS_LPAGE_USERSADD", 15); //User add.
761 define("SESS_LPAGE_MYRESERVATIONSLIST", 16); //Self-reservations list.
762 //
763 //
764 //--------------------------------------------------------------------------------------------------------------
765 //Eats the session identifier cookie, if any exists on the browser side.
766 //
767 function SESS_eat_fbopsid_cookie()
768 {
769 setcookie("fbopsid", //Cookie name.
770 FALSE, //Value. FALSE means eat the cookie.
771 0, //Expire when browser closes. The PHP documentation
772 //suggests to set this to a time well before the current
773 //time, but I don't believe this is necessary to eat a cookie.
774 CONFIG_URL_FSPATH . "/", //Path within the domain.
775 CONFIG_URL_DOMAIN, //Domain.
776 0); //Don't require secure connection.
777 }
778 //
779 //--------------------------------------------------------------------------------------------------------------
780 //Issues the SID to the browser.
781 //
782 function SESS_issue_fbopsid_cookie($sid)
783 {
784 setcookie("fbopsid", //Cookie name.
785 $sid, //Value. FALSE means eat the cookie.
786 0, //Value. 0 (according to the manual) means to keep cookie
787 //until browser closed.
788 CONFIG_URL_FSPATH . "/", //Path within the domain.
789 CONFIG_URL_DOMAIN, //Domain.
790 0); //Don't require secure connection.
791 }
792 //
793 //--------------------------------------------------------------------------------------------------------------
794 //Inserts a new record into the SESS database, using the passed associative array to assign the fields.
795 //Each element of the associative array is indexed by a field name.
796 //
797 //The function returns the integer index of the record added.
798 //
799 //This operation cannot fail. The autoincrement index is the primary key, so no duplicates or other
800 //error conditions are meaningful.
801 //
802 function SESS_insert($arg)
803 {
804 global $GLOBAL_dbhandle;
805 global $GLOBAL_dblocked;
806
807 //Build the query string with each successive parameter.
808 //
809 //sguid
810 //-----
811 if (! isset($arg["sguid"]))
812 $pushval = "";
813 else
814 $pushval = $arg["sguid"];
815 $query_string = "INSERT INTO sess SET sguid=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"";
816 //
817 //ip
818 //------
819 if (! isset($arg["ip"]))
820 $pushval = "";
821 else
822 $pushval = $arg["ip"];
823 $query_string .= (", ip=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
824 //
825 //sid
826 //---
827 if (! isset($arg["sid"]))
828 $pushval = "";
829 else
830 $pushval = $arg["sid"];
831 $query_string .= (", sid=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
832 //
833 //revaltime
834 //---------
835 if (! isset($arg["revaltime"]))
836 $pushval = "";
837 else
838 $pushval = $arg["revaltime"];
839 $query_string .= (", revaltime=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
840 //
841 //lifetime
842 //--------
843 if (! isset($arg["lifetime"]))
844 $pushval = 0;
845 else
846 $pushval = $arg["lifetime"];
847 $query_string .= (", lifetime=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
848 //
849 //usrsidx
850 //-------
851 if (! isset($arg["usrsidx"]))
852 $pushval = 0;
853 else
854 $pushval = $arg["usrsidx"];
855 $query_string .= (", usrsidx=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
856 //
857 //menulvl
858 //-------
859 if (! isset($arg["menulvl"]))
860 $pushval = 0;
861 else
862 $pushval = $arg["menulvl"];
863 $query_string .= (", menulvl=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
864 //
865 //pagereloadtime
866 //--------------
867 if (! isset($arg["pagereloadtime"]))
868 $pushval = 0;
869 else
870 $pushval = $arg["pagereloadtime"];
871 $query_string .= (", pagereloadtime=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
872 //
873 //sddt
874 //----
875 if (! isset($arg["sddt"]))
876 $pushval = "";
877 else
878 $pushval = $arg["sddt"];
879 $query_string .= (", sddt=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
880 //
881 //sdtim
882 //-----
883 if (! isset($arg["sdtim"]))
884 $pushval = "";
885 else
886 $pushval = $arg["sdtim"];
887 $query_string .= (", sdtim=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
888 //
889 //logicalpage
890 //-----------
891 if (! isset($arg["logicalpage"]))
892 $pushval = 0;
893 else
894 $pushval = $arg["logicalpage"];
895 $query_string .= (", logicalpage=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
896 //
897 //curuser
898 //-------
899 if (! isset($arg["curuser"]))
900 $pushval = 0;
901 else
902 $pushval = $arg["curuser"];
903 $query_string .= (", curuser=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
904 //
905 //curresource
906 //-----------
907 if (! isset($arg["curresource"]))
908 $pushval = 0;
909 else
910 $pushval = $arg["curresource"];
911 $query_string .= (", curresource=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
912 //
913 //curreservation
914 //--------------
915 if (! isset($arg["curreservation"]))
916 $pushval = 0;
917 else
918 $pushval = $arg["curreservation"];
919 $query_string .= (", curreservation=\"" . mysql_real_escape_string ($pushval, $GLOBAL_dbhandle) . "\"");
920 //
921 //Execute the query to insert the record.
922 $result = mysql_query($query_string, $GLOBAL_dbhandle);
923 //
924 //If the insert failed, our caller gets FALSE.
925 if ($result == FALSE)
926 {
927 $rv = FALSE;
928 }
929 else
930 {
931 //The insert was successful. Figure out the index that was assigned.
932 $result = mysql_query("SELECT LAST_INSERT_ID()");
933
934 //If we have a failure, the caller gets FALSE, otherwise the caller gets the
935 //index.
936 if ($result === FALSE)
937 {
938 $rv = FALSE;
939 }
940 else
941 {
942 //Pick apart the result.
943 $row = mysql_fetch_array($result, MYSQL_NUM);
944
945 //Extract the integer.
946 $rv = $row[0];
947
948 //Free the result memory.
949 mysql_free_result($result);
950 }
951 }
952
953 //Return the result.
954 return($rv);
955 }
956 //
957 //--------------------------------------------------------------------------------------------------------------
958 //Retrieves a two dimensional associative array corresponding to the SESS record with
959 //the passed SID, or FALSE if the record does not exist.
960 //
961 function SESS_retrieve_by_sid($sid)
962 {
963 global $GLOBAL_dbhandle;
964
965 //Form the query string.
966 $query_string = "SELECT * FROM sess WHERE sid=\""
967 .
968 mysql_real_escape_string($sid, $GLOBAL_dbhandle)
969 .
970 "\"";
971
972 //Execute the query.
973 $result = mysql_query($query_string, $GLOBAL_dbhandle);
974
975 if ($result === FALSE)
976 {
977 //Unknown query failure. Return FALSE to the caller. No need to free,
978 //as this is not a result.
979 $rv = FALSE;
980 }
981 else
982 {
983 //Figure out how many rows in the result.
984 $nrows = mysql_num_rows($result);
985
986 if ($nrows == 0)
987 {
988 //No rows in the result. The query failed to give us a record, but still
989 //we need to free the result set.
990
991 //Free the result.
992 mysql_free_result($result);
993
994 //The caller gets FALSE. No record with that SID.
995 $rv = FALSE;
996 }
997 else
998 {
999 //We have at least one record. Assume just one, because the SID is supposed
1000 //to be unique.
1001 $rv = mysql_fetch_assoc($result); //Get the associative record.
1002
1003 //Free the result.
1004 mysql_free_result($result);
1005 }
1006
1007 //Return the value to the caller.
1008 return($rv);
1009 }
1010 }
1011 //
1012 //--------------------------------------------------------------------------------------------------------------
1013 //Deletes the server-side session information corresponding to the passed SID, if it exists in the
1014 //SESS table. Returns TRUE if at least one record is deleted, or FALSE otherwise.
1015 //
1016 function SESS_delete_by_sid($sid)
1017 {
1018 global $GLOBAL_dbhandle;
1019
1020 //Form the query string.
1021 $query_string = "DELETE FROM sess WHERE sid=\""
1022 .
1023 mysql_real_escape_string($sid, $GLOBAL_dbhandle)
1024 .
1025 "\"";
1026
1027 //Execute the query.
1028 mysql_query($query_string, $GLOBAL_dbhandle);
1029
1030 //Figure out how many rows were affected.
1031 $ar = mysql_affected_rows($GLOBAL_dbhandle);
1032
1033 //Return the right value to the caller.
1034 if ($ar <= 0)
1035 return(FALSE);
1036 else
1037 return(TRUE);
1038 }
1039 //
1040 //--------------------------------------------------------------------------------------------------------------
1041 //Description:
1042 // Authenticates a supplied password against the non-temporary password hash stored with the supplied
1043 // database record from the user information. There is also a possibility that the non-temporary
1044 // hash field is the empty string, which means that no password will authenticate.
1045 //
1046 // Returns TRUE if the authentication was successful or FALSE otherwise.
1047 //
1048 function SESS_nontemppwauth($userinfo, $password)
1049 {
1050 if (PASSWD_pwd_hash_auth($userinfo["pwhash"], $password) == 1)
1051 return(TRUE);
1052 else
1053 return(FALSE);
1054 }
1055 //
1056 //--------------------------------------------------------------------------------------------------------------
1057 //Description:
1058 // Authenticates a supplied password against the temporary password hash stored with the supplied
1059 // database record from the user information. In order to authenticate, the the temporary
1060 // password also must not be expired.
1061 //
1062 // Returns TRUE if the authentication was successful or FALSE otherwise.
1063 //
1064 function SESS_temppwauth($userinfo, $password)
1065 {
1066 global $GLOBAL_utime_ut;
1067
1068 if (!strlen($userinfo["lostpwgentime"]) || !strlen($userinfo["lostpwhash"]))
1069 {
1070 return(FALSE);
1071 }
1072 else
1073 {
1074 if (
1075 UTIME_time_diff_coarse_28($GLOBAL_utime_ut, $userinfo["lostpwgentime"])
1076 > //Waiting time elapsed.
1077 (CONFIG_LOGIN_REC_TEMP_PW_LIFETIME * 60) //*60 because constant in minutes.
1078 )
1079 {
1080 return(FALSE); //Temporary password has expired, so can't authenticate.
1081 }
1082 else
1083 {
1084 if (PASSWD_pwd_hash_auth($userinfo["lostpwhash"], $password) == 1)
1085 return(TRUE);
1086 }
1087 }
1088
1089 //If we're lost and get here, authentication failed.
1090 return(FALSE);
1091 }
1092 //
1093 //--------------------------------------------------------------------------------------------------------------
1094 //Description:
1095 // Opens a new session on the server based on the passed user information and returns the
1096 // SID.
1097 //
1098 function SESS_open_new_uinfo($userinfo)
1099 {
1100 global $GLOBAL_client_ip;
1101 global $GLOBAL_utime_ut;
1102
1103 //Populate the SGUID.
1104 $sess["sguid"] = SGUID_sguid();
1105
1106 //Populate the IP address.
1107 $sess["ip"] = $GLOBAL_client_ip;
1108
1109 //Populate the session identifier.
1110 $sid = SID_sid();
1111 $sess["sid"] = $sid;
1112
1113 //Populate the revalidation time.
1114 $sess["revaltime"] = $GLOBAL_utime_ut;
1115
1116 //Populate the lifetime. The lifetime is either the value stored in the permission string (if it
1117 //exists there), or else the default value.
1118 $sess["lifetime"] = PERM_get_val_from_string($userinfo["perm"], "sesslifetimedefault");
1119 if ($sess["lifetime"] === FALSE) //If that permission/attribute does not exist.
1120 $sess["lifetime"] = CONFIG_SESS_LIFETIME_DEFAULT;
1121
1122 //Populate the index of the relevant user.
1123 $sess["usrsidx"] = $userinfo["idx"];
1124
1125 //Insert the record into the database.
1126 SESS_insert($sess);
1127
1128 //Return the session ID to the caller.
1129 return($sid);
1130 }
1131 //
1132 //--------------------------------------------------------------------------------------------------------------
1133 //Description:
1134 // Authenticates a supplied userid and password, and returns result information to the caller.
1135 // If the userid/password authenticate, retract the old cookie, open a new session on the server side,
1136 // and issue a new cookie.
1137 //
1138 // This function is called from the main scheduling page when a userid/password is entered.
1139 //
1140 // If the userid supplied corresponds to a non-existent account:
1141 //
1142 // a)Destroy any existing server-side session information based on the current SID cookie.
1143 // b)Eat the current SID cookie, if any, on the client side.
1144 // c)Set the $curuserinfo to FALSE.
1145 // d)Set the $cursessioninfo to FALSE.
1146 // e)Set the $rcode to SESS_RCODE_FAIL_USERID_NOEXIST.
1147 //
1148 // Else if the userid exists and the password authenticates:
1149 //
1150 // If the account is inactive or expired:
1151 //
1152 // a)Destroy any existing server-side session information based on the current SID
1153 // cookie.
1154 // b)Eat the current SID cookie, if any, on the client side.
1155 // c)Set the $curuserinfo to FALSE.
1156 // d)Set the $cursessioninfo to FALSE.
1157 // e)Set the $rcode to SESS_RCODE_FAIL_USERID_EXPIRED_INACTIVE.
1158 //
1159 // Else if authentication was successful based on a temporary password:
1160 //
1161 // a)Destroy any existing server-side session information based on the current SID
1162 // cookie.
1163 // b)Open a new session on the server side.
1164 // c)Issue a new SID cookie to the client.
1165 // d)Set the $curuserinfo to the user specified.
1166 // e)Set the $cursessioninfo to the newly-created session.
1167 // f)Set the $rcode to SESS_RCODE_SUCCESS_TEMP_PASSWORD.
1168 //
1169 // Else if authentication was successful:
1170 //
1171 // a)Destroy any existing server-side session information based on the current SID
1172 // cookie.
1173 // b)Open a new session on the server side.
1174 // c)Issue a new SID cookie to the client.
1175 // d)Set the $curuserinfo to the user specified.
1176 // e)Set the $cursessioninfo to the newly-created session.
1177 // f)Set the $rcode to SESS_RCODE_SUCCESS.
1178 //
1179 // Else if the userid exists but the password does not authenticate:
1180 //
1181 // a)Destroy any existing server-side session information based on the current SID
1182 // cookie.
1183 // b)Eat the current SID cookie, if any, on the client side.
1184 // c)Set the $curuserinfo to FALSE.
1185 // d)Set the $cursessioninfo to FALSE.
1186 // e)Set the $rcode to SESS_RCODE_FAIL_PASSWD.
1187 //
1188 //Return Value:
1189 // $rcode : Set to a constant defined at the start of this file to indicate
1190 // what occurred.
1191 // $curuserinfo : Set to an associative array containing full user information
1192 // about a user who logs in, or FALSE if no user has successfully
1193 // authenticated.
1194 // $cursessioninfo : An associative array containing the complete record for the now
1195 // active session, or FALSE if no session is active.
1196 //
1197 function SESS_userid_pwd_authenticate_open_session($userid, $password, &$rcode, &$curuserinfo, &$cursessioninfo)
1198 {
1199 global $PAR_fbopsid;
1200 global $GLOBAL_stime_string;
1201 global $GLOBAL_client_ip;
1202
1203 //Condition the userid to exclude forbidden characters.
1204 $userid = STRFUNC_force_into_subset($userid, "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
1205
1206 //Convert the userid to all lower-case. This is the canonical form for userids.
1207 $userid = StrToLower($userid);
1208
1209 //Remove all invalid characters from the password. However, don't convert it to lower-case. Passwords are
1210 //case-sensitive.
1211 $password = STRFUNC_force_into_subset($password, "-0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
1212
1213 //Try to obtain the user information from the database corresponding to the userid.
1214 $curuserinfo = USRS_retrieve_by_userid($userid);
1215
1216 //print_r($curuserinfo);
1217 //return;
1218
1219 //If the userid does not exist, return the correct error code.
1220 if ($curuserinfo === FALSE)
1221 {
1222 //Log the authentication failure.
1223 LOG_log(LOG_ET_LOGIN_FAIL,
1224 $GLOBAL_stime_string,
1225 $GLOBAL_client_ip,
1226 "",
1227 ($PAR_fbopsid === FALSE) ? ("") : ($PAR_fbopsid),
1228 $_SERVER["PHP_SELF"],
1229 "",
1230 __FILE__,
1231 __LINE__,
1232 "Password authentication failure, non-existent userid=\"" . $userid . "\".");
1233
1234 //Destroy any existing server-side session information based on the current SID cookie.
1235 if ($PAR_fbopsid !== FALSE)
1236 SESS_delete_by_sid($PAR_fbopsid);
1237
1238 //Eat the client-side cookie.
1239 SESS_eat_fbopsid_cookie();
1240
1241 //Set the $curuserinfo to FALSE.
1242 $curuserinfo = FALSE;
1243
1244 //Set the $cursessioninfo to FALSE.
1245 $cursessioninfo = FALSE;
1246
1247 //Set the $rcode to SESS_RCODE_FAIL_USERID_NOEXIST.
1248 $rcode = SESS_RCODE_FAIL_USERID_NOEXIST;
1249
1250 return;
1251 }
1252
1253 //If the userid exists but is not active, refuse the authentication.
1254 if ($curuserinfo["status"] != USRS_STATUS_ACTIVE)
1255 {
1256 //Log the authentication failure.
1257 LOG_log(LOG_ET_LOGIN_FAIL,
1258 $GLOBAL_stime_string,
1259 $GLOBAL_client_ip,
1260 "",
1261 ($PAR_fbopsid === FALSE) ? ("") : ($PAR_fbopsid),
1262 $_SERVER["PHP_SELF"],
1263 "",
1264 __FILE__,
1265 __LINE__,
1266 "Password authentication failure, expired or inactive userid=\"" . $userid . "\".");
1267
1268 //Destroy any existing server-side session information based on the current SID cookie.
1269 if ($PAR_fbopsid !== FALSE)
1270 SESS_delete_by_sid($PAR_fbopsid);
1271
1272 //Eat the client-side cookie.
1273 SESS_eat_fbopsid_cookie();
1274
1275 //Set the $curuserinfo to FALSE.
1276 $curuserinfo = FALSE;
1277
1278 //Set the $cursessioninfo to FALSE.
1279 $cursessioninfo = FALSE;
1280
1281 //Set the $rcode to SESS_RCODE_FAIL_USERID_EXPIRED_INACTIVE.
1282 $rcode = SESS_RCODE_FAIL_USERID_EXPIRED_INACTIVE;
1283
1284 return;
1285 }
1286
1287 //The user exists and the user's status is active. Figure out if the password is consistent
1288 //with the stored non-temporary password.
1289 //
1290 if (SESS_nontemppwauth($curuserinfo, $password))
1291 {
1292 //The password supplied matches the non-temporary password hash in the database.
1293 //
1294 //Open a new session on the server side.
1295 $sid = SESS_open_new_uinfo($curuserinfo);
1296 //
1297 //Log the authentication success.
1298 LOG_log(LOG_ET_LOGIN_OK,
1299 $GLOBAL_stime_string,
1300 $GLOBAL_client_ip,
1301 $userid,
1302 $sid,
1303 $_SERVER["PHP_SELF"],
1304 "",
1305 __FILE__,
1306 __LINE__,
1307 "Password authentication.");
1308 //
1309 //Issue the new cookie to the browser. It isn't necessary to replace any existing old,
1310 //as this one will just replace it.
1311 SESS_issue_fbopsid_cookie($sid);
1312 //
1313 //The current user information has already been obtained. Pull the
1314 //session information.
1315 $cursessioninfo = SESS_retrieve_by_sid($sid);
1316 //
1317 //Set the return code.
1318 $rcode = SESS_RCODE_SUCCESS;
1319 //
1320 return;
1321 }
1322
1323
1324 //The user exists and the user's status is active. Figure out if the password is consistent
1325 //with the stored temporary password.
1326 //
1327 if (SESS_temppwauth($curuserinfo, $password))
1328 {
1329 //The password supplied matches the temporary password hash in the database.
1330 //
1331 //Open a new session on the server side.
1332 $sid = SESS_open_new_uinfo($curuserinfo);
1333 //
1334 //Log the authentication success.
1335 LOG_log(LOG_ET_LOGIN_OK,
1336 $GLOBAL_stime_string,
1337 $GLOBAL_client_ip,
1338 $userid,
1339 $sid,
1340 $_SERVER["PHP_SELF"],
1341 "",
1342 __FILE__,
1343 __LINE__,
1344 "Temporary password authentication.");
1345 //
1346 //Issue the new cookie to the browser. It isn't necessary to replace any existing old,
1347 //as this one will just replace it.
1348 SESS_issue_fbopsid_cookie($sid);
1349 //
1350 //The current user information has already been obtained. Pull the
1351 //session information.
1352 $cursessioninfo = SESS_retrieve_by_sid($sid);
1353 //
1354 //Set the return code.
1355 $rcode = SESS_RCODE_SUCCESS_TEMP_PASSWORD;
1356 //
1357 return;
1358 }
1359
1360 //If we're here, the userid was OK, but the password was wrong.
1361 //Log the authentication failure.
1362 LOG_log(LOG_ET_LOGIN_FAIL,
1363 $GLOBAL_stime_string,
1364 $GLOBAL_client_ip,
1365 $userid,
1366 ($PAR_fbopsid === FALSE) ? ("") : ($PAR_fbopsid),
1367 $_SERVER["PHP_SELF"],
1368 "",
1369 __FILE__,
1370 __LINE__,
1371 "Password authentication failure, bad password.");
1372
1373 //Destroy any existing server-side session information based on the current SID cookie.
1374 if ($PAR_fbopsid !== FALSE)
1375 SESS_delete_by_sid($PAR_fbopsid);
1376
1377 //Eat the client-side cookie.
1378 SESS_eat_fbopsid_cookie();
1379
1380 //Set the $curuserinfo to FALSE.
1381 $curuserinfo = FALSE;
1382
1383 //Set the $cursessioninfo to FALSE.
1384 $cursessioninfo = FALSE;
1385
1386 //Set the $rcode to indicate simple password failure.
1387 $rcode = SESS_RCODE_FAIL_PASSWD;
1388 }
1389 //
1390 //--------------------------------------------------------------------------------------------------------------
1391 //Logs out the user implied by the current SID cookie. The specific actions are:
1392 // a)Destroy any existing server-side session information.
1393 // b)Eat the client side SID cookie.
1394 //
1395 //Return Values:
1396 // $curuserinfo : By the definition of this what this function does, FALSE.
1397 // $cursessioninfo : By the definition of this what this function does, FALSE.
1398 //
1399 function SESS_logout(&$curuserinfo, &$cursessioninfo)
1400 {
1401 global $PAR_fbopsid;
1402 global $GLOBAL_stime_string;
1403 global $GLOBAL_client_ip;
1404
1405 //Save the $sid cookie, so we can log it.
1406 $log_sid = $PAR_fbopsid;
1407
1408 //Look up the session table entry.
1409 $cursessioninfo = SESS_retrieve_by_sid($log_sid);
1410
1411 //Look up the user information based on the index stored with
1412 //the session.
1413 if ($cursessioninfo !== FALSE)
1414 {
1415 $curuserinfo = USRS_retrieve_by_idx($cursessioninfo["usrsidx"]);
1416 }
1417 else
1418 {
1419 $curuserinfo = FALSE;
1420 }
1421
1422 //Swallow any session cookie.
1423 SESS_eat_fbopsid_cookie();
1424
1425 //Destroy the server-side session state, if any.
1426 if ($PAR_fbopsid !== FALSE)
1427 SESS_delete_by_sid($PAR_fbopsid);
1428
1429 //Log the voluntary logout.
1430 LOG_log(LOG_ET_LOGOUT_VOL,
1431 $GLOBAL_stime_string,
1432 $GLOBAL_client_ip,
1433 ($curuserinfo !== FALSE) ? ($curuserinfo["userid"]) : (""),
1434 ($log_sid === FALSE) ? ("") : ($log_sid),
1435 $_SERVER["PHP_SELF"],
1436 "",
1437 __FILE__,
1438 __LINE__,
1439 "Logout.");
1440
1441
1442 //Return values are, by definition, FALSE.
1443 $curuserinfo = FALSE;
1444 $cursessioninfo = FALSE;
1445 }
1446 //
1447 //--------------------------------------------------------------------------------------------------------------
1448 //Revalidates the session using the current SID cookie. The specific actions are:
1449 //
1450 // If the SID does not exist on the server side:
1451 // a)Eat the current client SID cookie.
1452 // Else if the session has expired due to inactivity:
1453 // a)Destroy the server-side session state.
1454 // b)Eat the client-side SID cookie.
1455 // Else [if the session is still active]:
1456 // Obtain the user information.
1457 // If the user does not exist or is inactive:
1458 // a)Destroy the server-side session state.
1459 // b)Eat the client-side SID cookie.
1460 // Else
1461 // If the privilege escalation period has expired
1462 // Lower the privelege escalation level.
1463 // Update the revalidation time.
1464 //
1465 //Return Values:
1466 // $curuserinfo : An associative array containing the complete record for the currently
1467 // authenticated user, or FALSE if no user is authenticated.
1468 // $cursessioninfo : An associative array containing the complete record for the currently
1469 // active session, or FALSE if no session is active.
1470 //
1471 function SESS_revalidate(&$curuserinfo, &$cursessioninfo)
1472 {
1473 global $GLOBAL_dbhandle;
1474 global $GLOBAL_dblocked;
1475 global $PAR_fbopsid;
1476 global $GLOBAL_stime_string;
1477 global $GLOBAL_client_ip;
1478 global $GLOBAL_utime_ut;
1479
1480 $cursessioninfo = FALSE;
1481 $curuserinfo = FALSE;
1482
1483 //If the SID isn't defined, no user and no session.
1484 if ($PAR_fbopsid === FALSE)
1485 {
1486 $curuserinfo = FALSE;
1487 $cursessioninfo = FALSE;
1488 return;
1489 }
1490
1491 //Try to look up the session in the database. If it does not exist
1492 //in the database, this is a bit suspicious but not impossible. The database
1493 //could have been reaped while somebody left their browser open for a long time.
1494 //If this is the case, no session and no user.
1495 //
1496 $cursessioninfo = SESS_retrieve_by_sid($PAR_fbopsid);
1497 //
1498 if ($cursessioninfo === FALSE)
1499 {
1500 //It is suspicious. Log it.
1501 LOG_log(LOG_ET_SEC_SID_FORGED,
1502 $GLOBAL_stime_string,
1503 $GLOBAL_client_ip,
1504 "",
1505 $PAR_fbopsid,
1506 $_SERVER["PHP_SELF"],
1507 "",
1508 __FILE__,
1509 __LINE__,
1510 "SID cookie value does not exist in server database, and was possibly forged.");
1511
1512 //Return value is no session and no user.
1513 $curuserinfo = FALSE;
1514 $cursessioninfo = FALSE;
1515 return;
1516 }
1517
1518 //Session exists. Try to look up the user identified in the session. If the user does not
1519 //exist, this is also suspicious. The only scenario under which this might happen is if a
1520 //user is expired or deleted during a session.
1521 //
1522 $curuserinfo = USRS_retrieve_by_idx($cursessioninfo["usrsidx"]);
1523 //
1524 if ($curuserinfo === FALSE)
1525 {
1526 //It is suspicious. Log it.
1527 LOG_log(LOG_ET_SEC_SID_FORGED,
1528 $GLOBAL_stime_string,
1529 $GLOBAL_client_ip,
1530 "",
1531 $PAR_fbopsid,
1532 $_SERVER["PHP_SELF"],
1533 "",
1534 __FILE__,
1535 __LINE__,
1536 "User index pointed to by SID record does not exist (idx=" . (string)$cursessioninfo["usrsidx"] . ").");
1537
1538 //Return value is no session and no user.
1539 $curuserinfo = FALSE;
1540 $cursessioninfo = FALSE;
1541 return;
1542 }
1543
1544 //If the user pointed to by the session isn't active, this probably means that
1545 //the user was expired or had the status changed manually during a session.
1546 //Destroy the server-side and client side session state, log it, and indicate
1547 //to the caller no user and no session.
1548 //If the userid exists but is not active, refuse the authentication.
1549 if ($curuserinfo["status"] != USRS_STATUS_ACTIVE)
1550 {
1551 //It is suspicious. Log it.
1552 LOG_log(LOG_ET_SEC_SID_FORGED,
1553 $GLOBAL_stime_string,
1554 $GLOBAL_client_ip,
1555 "",
1556 $PAR_fbopsid,
1557 $_SERVER["PHP_SELF"],
1558 "",
1559 __FILE__,
1560 __LINE__,
1561 "User pointed to by SID record has inactive status (idx=" . (string)$cursessioninfo["usrsidx"] . ").");
1562
1563 //Destroy any existing server-side session information based on the current SID cookie.
1564 if ($PAR_fbopsid !== FALSE)
1565 SESS_delete_by_sid($PAR_fbopsid);
1566
1567 //Eat the client-side cookie.
1568 SESS_eat_fbopsid_cookie();
1569
1570 //Return value is no session and no user.
1571 $curuserinfo = FALSE;
1572 $cursessioninfo = FALSE;
1573 return;
1574 }
1575
1576 //If the session has expired due to time, then log it and force the user out.
1577 //
1578 if (UTIME_time_diff_coarse_28($GLOBAL_utime_ut, $cursessioninfo["revaltime"]) > (int)$cursessioninfo["lifetime"])
1579 {
1580 //Log it.
1581 LOG_log(LOG_ET_LOGOUT_TIME,
1582 $GLOBAL_stime_string,
1583 $GLOBAL_client_ip,
1584 $curuserinfo["userid"],
1585 $PAR_fbopsid,
1586 $_SERVER["PHP_SELF"],
1587 "",
1588 __FILE__,
1589 __LINE__,
1590 "Session expired due to inactive time.");
1591
1592 //Destroy any existing server-side session information based on the current SID cookie.
1593 if ($PAR_fbopsid !== FALSE)
1594 SESS_delete_by_sid($PAR_fbopsid);
1595
1596 //Eat the client-side cookie.
1597 SESS_eat_fbopsid_cookie();
1598
1599 //Return value is no session and no user.
1600 $curuserinfo = FALSE;
1601 $cursessioninfo = FALSE;
1602 return;
1603 }
1604
1605 //If the connecting IP of the session has changed, this is bad news and probably some type of
1606 //security issue.
1607 //
1608 if ($cursessioninfo["ip"] != $GLOBAL_client_ip)
1609 {
1610 //Log it.
1611 LOG_log(LOG_ET_SEC_LOGOUT_IP,
1612 $GLOBAL_stime_string,
1613 $GLOBAL_client_ip,
1614 $curuserinfo["userid"],
1615 $PAR_fbopsid,
1616 $_SERVER["PHP_SELF"],
1617 "",
1618 __FILE__,
1619 __LINE__,
1620 "Stored session IP:" . $cursessioninfo["ip"] . " Current connection IP:" . $GLOBAL_client_ip . ".");
1621
1622 //Destroy any existing server-side session information based on the current SID cookie.
1623 if ($PAR_fbopsid !== FALSE)
1624 SESS_delete_by_sid($PAR_fbopsid);
1625
1626 //Eat the client-side cookie.
1627 SESS_eat_fbopsid_cookie();
1628
1629 //Return value is no session and no user.
1630 $curuserinfo = FALSE;
1631 $cursessioninfo = FALSE;
1632 return;
1633 }
1634
1635 //All the error conditions have been ruled out. Give the session a newer timestamp, log it, and return the
1636 //correct user and session information.
1637 mysql_query("UPDATE sess SET revaltime=\""
1638 . mysql_real_escape_string($GLOBAL_utime_ut, $GLOBAL_dbhandle)
1639 . "\" WHERE sid=\""
1640 . mysql_real_escape_string($PAR_fbopsid, $GLOBAL_dbhandle)
1641 . "\"",
1642 $GLOBAL_dbhandle);
1643 //
1644 LOG_log(LOG_ET_REVAL_OK,
1645 $GLOBAL_stime_string,
1646 $GLOBAL_client_ip,
1647 $curuserinfo["userid"],
1648 $PAR_fbopsid,
1649 $_SERVER["PHP_SELF"],
1650 "",
1651 __FILE__,
1652 __LINE__,
1653 "Session revalidation.");
1654
1655 //The $curuserinfo and $cursessioninfo values are OK for return.
1656 }
1657 //
1658 //--------------------------------------------------------------------------------------------------------------
1659 //Decrements the current menu level, stores it in the correct session record of the database,
1660 //and returns the new level, clipped to [0, 2].
1661 //
1662 //No mutual exclusion should be necessary, as a session is tied to one terminal IP--unless a user
1663 //has multiple browsers open and is doing something unusual, there should be nothing noticeable.
1664 //Even then it is iffy and there will be no ill effects.
1665 //
1666 function SESS_menulevel_decrement($sid_in, $menulevel_current)
1667 {
1668 global $GLOBAL_dbhandle;
1669
1670 //Adjust the menulevel to be one smaller.
1671 if ($menulevel_current == 2)
1672 $menulevel_new = 1;
1673 else if ($menulevel_current == 1)
1674 $menulevel_new = 0;
1675 else
1676 $menulevel_new = 0;
1677
1678 //Form a query to reflect assigning the new menu level to the session ID
1679 //record.
1680 $query_string = "UPDATE sess SET menulvl=\"" . (string)$menulevel_new . "\" WHERE sid=\"" . $sid_in . "\"";
1681
1682 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1683 mysql_query($query_string, $GLOBAL_dbhandle);
1684
1685 //Return the new value.
1686 return($menulevel_new);
1687 }
1688 //
1689 //--------------------------------------------------------------------------------------------------------------
1690 //Increments the current menu level, stores it in the correct session record of the database,
1691 //and returns the new level, clipped to [0, 2].
1692 //
1693 //No mutual exclusion should be necessary, as a session is tied to one terminal IP--unless a user
1694 //has multiple browsers open and is doing something unusual, there should be nothing noticeable.
1695 //Even then it is iffy and there will be no ill effects.
1696 //
1697 function SESS_menulevel_increment($sid_in, $menulevel_current)
1698 {
1699 global $GLOBAL_dbhandle;
1700
1701 //Adjust the menulevel to be one larger.
1702 if ($menulevel_current == 0)
1703 $menulevel_new = 1;
1704 else if ($menulevel_current == 1)
1705 $menulevel_new = 2;
1706 else
1707 $menulevel_new = 2;
1708
1709 //Form a query to reflect assigning the new menu level to the session ID
1710 //record.
1711 $query_string = "UPDATE sess SET menulvl=\"" . (string)$menulevel_new . "\" WHERE sid=\"" . $sid_in . "\"";
1712
1713 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1714 mysql_query($query_string, $GLOBAL_dbhandle);
1715
1716 //Return the new value.
1717 return($menulevel_new);
1718 }
1719 //
1720 //--------------------------------------------------------------------------------------------------------------
1721 //Updates the SDDT and SDTIM associated with the session, session identifier passed.
1722 //
1723 //To update only SDDT or SDTIM, set the other parameter FALSE.
1724 //
1725 //If both parameters are FALSE, nothing will be updated.
1726 //
1727 function SESS_update_sddt_sdtim($sid_in, $sddt_in, $sdtim_in)
1728 {
1729 global $GLOBAL_dbhandle;
1730
1731 //echo "<pre>\n";
1732 //print_r($sid_in);
1733 //print_r($sddt_in);
1734 //print_r($sdtim_in);
1735 //echo "</pre>\n";
1736
1737 if (($sddt_in !== FALSE) && ($sdtim_in !== FALSE))
1738 {
1739 //Both parameters are specified, the most common case.
1740 $query_string = "UPDATE sess SET sddt=\""
1741 .
1742 mysql_real_escape_string ((string)$sddt_in, $GLOBAL_dbhandle)
1743 .
1744 "\", sdtim=\""
1745 .
1746 mysql_real_escape_string ((string)$sdtim_in, $GLOBAL_dbhandle)
1747 .
1748 "\" WHERE sid=\""
1749 .
1750 $sid_in
1751 .
1752 "\"";
1753
1754 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1755 mysql_query($query_string, $GLOBAL_dbhandle);
1756 }
1757 else if (($sddt_in === FALSE) && ($sdtim_in !== FALSE))
1758 {
1759 //Only time is specified.
1760 $query_string = "UPDATE sess SET sdtim=\""
1761 .
1762 mysql_real_escape_string ((string)$sdtim_in, $GLOBAL_dbhandle)
1763 .
1764 "\" WHERE sid=\""
1765 .
1766 $sid_in
1767 .
1768 "\"";
1769
1770 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1771 mysql_query($query_string, $GLOBAL_dbhandle);
1772 }
1773 else if (($sddt_in !== FALSE) && ($sdtim_in === FALSE))
1774 {
1775 //Only date is specified.
1776 $query_string = "UPDATE sess SET sddt=\""
1777 .
1778 mysql_real_escape_string ((string)$sddt_in, $GLOBAL_dbhandle)
1779 .
1780 "\" WHERE sid=\""
1781 .
1782 $sid_in
1783 .
1784 "\"";
1785
1786 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1787 mysql_query($query_string, $GLOBAL_dbhandle);
1788 }
1789 else
1790 {
1791 //Do nothing. Neither parameter is specified.
1792 }
1793 }
1794 //
1795 //--------------------------------------------------------------------------------------------------------------
1796 //Updates the logicalpage associated with a session.
1797 //
1798 function SESS_logicalpage_set($sid_in, $logicalpage_in)
1799 {
1800 global $GLOBAL_dbhandle;
1801
1802 $query_string = "UPDATE sess SET logicalpage=\""
1803 .
1804 mysql_real_escape_string ((string)$logicalpage_in, $GLOBAL_dbhandle)
1805 .
1806 "\" WHERE sid=\""
1807 .
1808 $sid_in
1809 .
1810 "\"";
1811
1812 //Run the query. We don't much care whether it fails or succeeds (nothing to be done, anyway).
1813 mysql_query($query_string, $GLOBAL_dbhandle);
1814 }
1815 //
1816 //--------------------------------------------------------------------------------------------------------------
1817 //Gets the logicalpage integer associated with a session. Returns SESS_LPAGE_UNDEFINED if can't figure
1818 //out what that is.
1819 //
1820 function SESS_logicalpage_get($sid_in)
1821 {
1822 global $GLOBAL_dbhandle;
1823
1824 //Form the query string.
1825 $query_string = "SELECT logicalpage FROM sess WHERE sid=\""
1826 .
1827 mysql_real_escape_string($sid_in, $GLOBAL_dbhandle)
1828 .
1829 "\"";
1830
1831 //Execute the query.
1832 $result = mysql_query($query_string, $GLOBAL_dbhandle);
1833
1834 if ($result === FALSE)
1835 {
1836 //Unknown query failure. Return a result code to the caller indicating
1837 //don't know.
1838 return(SESS_LPAGE_UNDEFINED);
1839 }
1840 else
1841 {
1842 //Get the integer result.
1843 $row = mysql_fetch_array($result, MYSQL_NUM);
1844
1845 $rv = $row[0];
1846
1847 //Free the result.
1848 mysql_free_result($result);
1849
1850 //Return the appropriate.
1851 if($rv > 0)
1852 return($rv);
1853 else
1854 return(SESS_LPAGE_UNDEFINED);
1855 }
1856 }
1857 //
1858 //--------------------------------------------------------------------------------------------------------------
1859 //End of $RCSfile: sess.inc,v $.
1860 //--------------------------------------------------------------------------------------------------------------
1861 ?>

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