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<?php
#
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# Standard definitions! 
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#
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$TBDIR          = "@prefix@/";
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$OURDOMAIN      = "@OURDOMAIN@";
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$BOSSNODE       = "@BOSSNODE@";
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$TBADMINGROUP   = "@TBADMINGROUP@";
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$WWWHOST	= "@WWWHOST@";
$WWW		= "@WWW@";
$TBAUTHDOMAIN	= "@TBAUTHDOMAIN@";
$TBBASE		= "@TBBASE@";
$TBDOCBASE	= "@TBDOCBASE@";
$TBWWW		= "@TBWWW@";
$THISHOMEBASE	= "@THISHOMEBASE@";
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$TBMAILADDR_OPS		= "@TBOPSEMAIL_NOSLASH@";
$TBMAILADDR_WWW		= "@TBWWWEMAIL_NOSLASH@";
$TBMAILADDR_APPROVAL	= "@TBAPPROVALEMAIL_NOSLASH@";
$TBMAILADDR_LOGS	= "@TBLOGSEMAIL_NOSLASH@";
$TBMAILADDR_AUDIT	= "@TBAUDITEMAIL_NOSLASH@";

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# Can override this in the defs file. 
$TBAUTHTIMEOUT  = "@TBAUTHTIMEOUT@";
$TBMAINSITE     = "@TBMAINSITE@";
$TBSECURECOOKIES= "@TBSECURECOOKIES@";
$TBCOOKIESUFFIX = "@TBCOOKIESUFFIX@";
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$TBWWW_DIR	= "$TBDIR"."www/";
$TBBIN_DIR	= "$TBDIR"."bin/";
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$TBETC_DIR	= "$TBDIR"."etc/";
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$TBLIBEXEC_DIR	= "$TBDIR"."libexec/";
$TBSUEXEC_PATH  = "$TBLIBEXEC_DIR/suexec";
$TBCHKPASS_PATH = "$TBLIBEXEC_DIR/checkpass";
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$TBCSLOGINS     = "$TBETC_DIR/cslogins";
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#
# Hardcoded check against $WWWHOST, to prevent anyone from accidentally setting
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# $TBMAINSITE when it should not be
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#
if ($WWWHOST != "www.emulab.net") {
    $TBMAINSITE = 0;
}

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$TBPROJ_DIR     = "/proj";
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$TBUSER_DIR	= "/users";
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$TBGROUP_DIR	= "/groups";
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$TBNSSUBDIR     = "nsdir";
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$TBAUTHCOOKIE   = "HashCookie" . $TBCOOKIESUFFIX;
$TBNAMECOOKIE   = "MyUidCookie" . $TBCOOKIESUFFIX;
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$HTTPTAG        = "http://";

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$TBMAIL_OPS		= "Testbed Ops <$TBMAILADDR_OPS>";
$TBMAIL_WWW		= "Testbed WWW <$TBMAILADDR_WWW>";
$TBMAIL_APPROVAL	= "Testbed Approval <$TBMAILADDR_APPROVAL>";
$TBMAIL_LOGS		= "Testbed Logs <$TBMAILADDR_LOGS>";
$TBMAIL_AUDIT		= "Testbed Audit <$TBMAILADDR_AUDIT>";

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#
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# This just spits out an email address in a page, so it does not need
# to be configured per development tree. It could be though ...
# 
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$TBMAILADDR     = "<a href=\"mailto:$TBMAILADDR_OPS\">
                      Testbed Operations ($TBMAILADDR_OPS)</a>";
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# So subscripts always know ...
putenv("HTTP_SCRIPT=1");

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#
# Database constants and the like.
#
include("dbdefs.php3");

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#
# Wrap up the mail function so we can prepend a tag to the subject
# line that indicates what testbed. Useful when multiple testbed
# email to the same list.
#
# 
function TBMAIL($to, $subject, $message, $headers = 0)
{
    global $THISHOMEBASE;
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    global $SCRIPT_NAME;
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    $subject = strtoupper($THISHOMEBASE) . ": $subject";

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    $tag = "X-NetBed: " . basename($SCRIPT_NAME);
    
    if ($headers) {
	$headers = "$headers\n" . $tag;
    }
    else {
	$headers = $tag;
    }
    return mail($to, $subject, $message, $headers);
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}

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#
# Internal errors should be reported back to the user simply. The actual 
# error information should be emailed to the list for action. The script
# should then terminate if required to do so.
#
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function TBERROR ($message, $death, $xmp = 0) {
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    global $TBMAIL_WWW, $TBMAIL_OPS, $TBMAILADDR;
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    TBMAIL($TBMAIL_OPS,
         "WEB ERROR REPORT",
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         "\n".
         "$message\n\n".
         "Thanks,\n".
         "Testbed WWW\n",
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         "From: $TBMAIL_OPS\n".
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         "Errors-To: $TBMAIL_WWW");
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    if ($death) {
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	if ($xmp)
	    $message = "<XMP>$message</XMP>\n";
	
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            $msg = "<font size=+1><br>
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                    $message
	            <br>	
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        	    </font>
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                    <p><p><p>
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		    Could not continue. Please contact $TBMAILADDR\n";

	    PAGEERROR($msg);
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    }
    return 0;
}
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#
# General user errors should print something warm and fuzzy
#
function USERERROR($message, $death) {
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    global $TBMAILADDR;

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    $msg = "<font size=+1><br>
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            $message
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      	    </font>
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            <br><br><br>
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            <font size=-1>
            Please contact $TBMAILADDR if you feel this message is an error.
            </font>\n";
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    if ($death) {
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	PAGEERROR($msg);
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    }
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    else
        echo "$msg\n";
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}

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#
# A form error.
#
function FORMERROR($field) {
    USERERROR("Missing field; ".
              "Please go back and fill out the \"$field\" field!", 1);
}

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#
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# SUEXEC stuff.
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#
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# Save this stuff so we can generate better error messages and such.
# 
$suexec_cmdandargs = "";
$suexec_retval     = 0;
$suexec_output;
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#
# Actions for suexec. 
#
define("SUEXEC_ACTION_CONTINUE",	0);
define("SUEXEC_ACTION_DIE",		1);
define("SUEXEC_ACTION_USERERROR",	2);
define("SUEXEC_ACTION_IGNORE",		3);
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#
# An suexec error.
#
function SUEXECERROR($action)
{
    global $suexec_cmdandargs, $suexec_retval, $suexec_output;
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    $foo  = "Shell Program Error. Exit status: $suexec_retval\n";
    $foo .= "  '$suexec_cmdandargs'\n";
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    if (count($suexec_output)) {
	$foo .= "\n";
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	for ($i = 0; $i < count($suexec_output); $i++) {
	    $foo .= "$suexec_output[$i]\n";
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	}
    }
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    switch ($action) {
    case SUEXEC_ACTION_CONTINUE:
	TBERROR($foo, 1, 0);
        break;
    case SUEXEC_ACTION_DIE:
	TBERROR($foo, 1, 1);
        break;
    case SUEXEC_ACTION_USERERROR:
	USERERROR("<XMP>$foo</XMP>", 1);
        break;
    case SUEXEC_ACTION_IGNORE:
	break;
    default:
	TBERROR($foo, 1, 1);
    }
}

#
# Run a program as a user.
#
function SUEXEC($uid, $gid, $cmdandargs, $action) {
    global $TBSUEXEC_PATH;
    global $suexec_cmdandargs, $suexec_retval, $suexec_output;

    ignore_user_abort(1);

    $suexec_cmdandargs = "$uid $gid $cmdandargs";
    $suexec_output     = array();
    $suexec_retval     = 0;
    
    exec("$TBSUEXEC_PATH $suexec_cmdandargs", $suexec_output, $suexec_retval);

    #
    # The output is still available of course, via $suexec_output.
    # 
    if ($suexec_retval == 0 || $action == SUEXEC_ACTION_IGNORE) {
	return $suexec_retval;
    }
    SUEXECERROR($action);
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}

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function ADDPUBKEY($uid, $cmdandargs) {
    global $TBSUEXEC_PATH;

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    #
    # Complication. User might not have an actual account if setting or
    # changing his own pubkeys. webonly, unapproved, and unverified users
    # can still muck with their personal info. So, just invoke as user
    # nobody. We will get audit email in case we need to track what has
    # happened. 
    #
    if (! HASREALACCOUNT($uid)) {
	$uid = "nobody";
    }
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    return SUEXEC($uid, "nobody", $cmdandargs, 0);
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}

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#
# Verify a URL.
#
function CHECKURL($url, &$error) {
    global $HTTPTAG;

    if (strlen($url)) {
	if (strstr($url, " ")) {
	    $error = "URL is malformed; spaces are not allowed!";
	    return 0;
	}
	
	if (strcmp($HTTPTAG, substr($url, 0, strlen($HTTPTAG)))) {
	    $error = "URL is malformed; must begin with $HTTPTAG!";
	    return 0;
	}
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	$fp = @fopen($url, "r");
	if (! $fp) {
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	    # Check to see if it was a redirect, in which case its OK
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	    for ($i = 0; $i < count($http_response_header); $i++) {
		if (!strcmp("Location:", substr($http_response_header[$i],0,9))) {
		    $is_redirect = 1;
		}
	    }
	    if (!$is_redirect) {
		$error = "URL is not valid; Cannot be accessed!";
		return 0;
	    }
	} else {
	    fclose($fp);
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	}
    }
    return 1;
}

#
# Check a password.
#
function CHECKPASSWORD($uid, $password, $name, $email, &$error)
{
    global $TBCHKPASS_PATH;
    
    $mypipe =
	popen(escapeshellcmd("$TBCHKPASS_PATH $password $uid '$name:$email'"),
	      "w+");
    
    if ($mypipe) { 
        $retval=fgets($mypipe, 1024);
        if (strcmp($retval,"ok\n") != 0) {
	    $error = "$retval";
	    return 0;
	}
	return 1;
    }
    TBERROR("Checkpass Failure! Returned '$mypipe'.\n\n".
	    "$TBCHKPASS_PATH $password $uid '$name:$email'", 1);
}

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function LASTNODELOGIN($node)
{
}

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#
# A function to print the contents of an array (recursively).
# Mostly useful for debugging.
#
function ARRAY_PRINT($arr) {
  if (!is_array($arr)) { echo "non-array '$arr'\n"; }
  foreach ($arr as $i => $val) {
    echo("'$i' - '$val'\n");
    if (is_array($val)) {
      echo "Sub-array $i:\n";
      array_print($val);
      echo "End Sub-array $i.\n";
    }
  }
}

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#
# Beware empty spaces (cookies)!
# 
require("tbauth.php3");
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#
# Okay, this is what checks the login and spits out the menu.
#
require("menu.php3");
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?>