source: trunk/dns.cgi@ 390

#!/usr/bin/perl -w -T
# Main web UI script for DeepNet DNS Administrator
##
# $Id: dns.cgi 390 2012-09-21 17:41:48Z kdeugau $
# Copyright 2008-2012 Kris Deugau <kdeugau@deepnet.cx>
# 
#    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 3 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, see <http://www.gnu.org/licenses/>.
##

use strict;
use warnings;

use CGI::Carp qw (fatalsToBrowser);
use CGI::Simple;
use HTML::Template;
use CGI::Session;
use Crypt::PasswdMD5;
use Digest::MD5 qw(md5_hex);
use Net::DNS;
use DBI;
use Data::Dumper;

#sub is_tainted {
#  # from perldoc perlsec
#  return ! eval { eval("#" . substr(join("", @_), 0, 0)); 1 };
#}
#use Cwd 'abs_path';
#use File::Basename;
#use lib dirname( abs_path $0 );
#die "argh!  tainted!" if is_tainted($0);
#die "argh! \@INC got tainted!" if is_tainted(@INC);

# don't remove!  required for GNU/FHS-ish install from tarball
use lib '.';    ##uselib##

use DNSDB qw(:ALL);

my @debugbits;  # temp, to be spit out near the end of processing
my $debugenv = 0;

# Let's do these templates right...
my $templatedir = "templates";

# Set up the CGI object...
my $q = new CGI::Simple;
# ... and get query-string params as well as POST params if necessary
$q->parse_query_string;

# This is probably excessive fiddling, but it puts the parameters somewhere my fingers know about...
my %webvar = $q->Vars;

# shut up some warnings, in case we arrive somewhere we forgot to set this
$webvar{defrec} = 'n' if !$webvar{defrec};      # non-default records
$webvar{revrec} = 'n' if !$webvar{revrec};      # non-reverse (domain) records

# load some local system defaults (mainly DB connect info)
# note this is not *absolutely* fatal, since there's a default dbname/user/pass in DNSDB.pm
# we'll catch a bad DB connect string once we get to trying that
##fixme:  pass params to loadConfig, and use them there, to allow one codebase to support multiple sites
if (!loadConfig()) {
  warn "Using default configuration;  unable to load custom settings: $DNSDB::errstr";
}

# persistent stuff needed on most/all pages
my $sid = ($webvar{sid} ? $webvar{sid} : undef);
my $session = new CGI::Session("driver:File", $sid, {Directory => $config{sessiondir}})
        or die CGI::Session->errstr();
#$sid = $session->id() if !$sid;
if (!$sid) {
  # init stuff.  can probably axe this down to just above if'n'when user manipulation happens
  $sid = $session->id();
  $session->expire($config{timeout});
# need to know the "upper" group the user can deal with;  may as well
# stick this in the session rather than calling out to the DB every time.
  $session->param('logingroup',1);
  $session->param('curgroup',1);        # yes, we *do* need to track this too.  er, probably.
  $session->param('domlistsortby','domain');
  $session->param('domlistorder','ASC');
  $session->param('revzonessortby','revnet');
  $session->param('revzonesorder','ASC');
  $session->param('useradminsortby','user');
  $session->param('useradminorder','ASC');
  $session->param('grpmansortby','group');
  $session->param('grpmanorder','ASC');
  $session->param('reclistsortby','host');
  $session->param('reclistorder','ASC');
  $session->param('loclistsortby','description');
  $session->param('loclistorder','ASC');
  $session->param('logsortby','stamp');
  $session->param('logorder','DESC');
}

# Just In Case.  Stale sessions should not be resurrectable.
if ($sid ne $session->id()) {
  $sid = '';
  changepage(page=> "login", sessexpired => 1);
}

# normal expiry, more or less
if ($session->is_expired) {
  $sid = '';
  changepage(page=> "login", sessexpired => 1);
}

my $logingroup = ($session->param('logingroup') ? $session->param('logingroup') : 1);
my $curgroup = ($session->param('curgroup') ? $session->param('curgroup') : $logingroup);

# decide which page to spit out...
# also set $webvar{page} before we try to use it.
$webvar{page} = 'login' if !$webvar{page};

# per-page startwith, filter, searchsubs

##fixme:  complain-munge-and-continue with non-"[a-z0-9-.]" filter and startwith
$webvar{startwith} =~ s/^(0-9|[a-z]).*/$1/ if $webvar{startwith};
# not much call for chars not allowed in domain names
$webvar{filter} =~ s/[^a-zA-Z0-9_.:\@-]//g if $webvar{filter};
## only set 'y' if box is checked, no other values legal
## however, see https://secure.deepnet.cx/trac/dnsadmin/ticket/31
# first, drop obvious fakes
delete $webvar{searchsubs} if $webvar{searchsubs} && $webvar{searchsubs} !~ /^[ny]/;
# strip the known "turn me off!" bit.
$webvar{searchsubs} =~ s/^n\s?// if $webvar{searchsubs};
# strip non-y/n - note this legitimately allows {searchsubs} to go empty
$webvar{searchsubs} =~ s/[^yn]//g if $webvar{searchsubs};

$session->param($webvar{page}.'startwith', $webvar{startwith}) if defined($webvar{startwith});
$session->param($webvar{page}.'filter', $webvar{filter}) if defined($webvar{filter});
$session->param($webvar{page}.'searchsubs', $webvar{searchsubs}) if defined($webvar{searchsubs});

my $startwith = $session->param($webvar{page}.'startwith');
my $filter = $session->param($webvar{page}.'filter');
my $searchsubs = $session->param($webvar{page}.'searchsubs');

# ... and assemble the args
my @filterargs;
push @filterargs, "^[$startwith]" if $startwith;
push @filterargs, $filter if $filter;

# nrgh, can't handle login here because we don't have a database handle to check the user/pass with yet

my $header = HTML::Template->new(filename => "$templatedir/header.tmpl");
my $footer = HTML::Template->new(filename => "$templatedir/footer.tmpl");
$header->param(orgname => $config{orgname}) if $config{orgname} ne 'Example Corp';
$footer->param(version => $DNSDB::VERSION);

## set up "URL to self"
# @#$%@%@#% XHTML - & in a URL must be escaped.  >:(
my $uri_self = $ENV{REQUEST_URI};
$uri_self =~ s/\&([a-z])/\&amp\;$1/g;

# le sigh.  and we need to strip any previous action
$uri_self =~ s/\&amp;action=[^&]+//g;

# and search filter options.  these get stored in the session, but discarded
# as soon as you switch to a different page.
##fixme:  think about retaining these on a per-page basis, as well as offset;  same as the sort-order bits
no warnings qw(uninitialized);
$uri_self =~ s/\&amp;startwith=[a-z09-]*(\&)?/$1/g;
$uri_self =~ s/\&amp;searchsubs=[a-z09-]*(\&)?/$1/g;
$uri_self =~ s/\&amp;filter=[a-z09-]*(\&)?/$1/g;
use warnings qw(uninitialized);

# Fix up $uri_self so we don't lose the session/page
$uri_self .= "?sid=$sid&amp;page=$webvar{page}" if $uri_self =~ m{/dns.cgi$};
$uri_self = "$ENV{SCRIPT_NAME}?sid=$sid&amp;page=$webvar{page}$1" if $uri_self =~ m{/dns.cgi\&(.+)$};

# pagination
my $perpage = 15;
$perpage = $config{perpage} if $config{perpage};
my $offset = ($webvar{offset} ? $webvar{offset} : 0);

# NB:  these must match the field name and SQL ascend/descend syntax respectively
my $sortby = "domain";
my $sortorder = "ASC";

##fixme: quit throwing the database handle around, and put all the SQL and direct DB fiddling into DNSDB.pm
# dbname, user, pass, host (optional)
my ($dbh,$msg) = connectDB($config{dbname}, $config{dbuser}, $config{dbpass}, $config{dbhost});

if (!$dbh) {
  print "Content-type: text/html\n\n";
  print $header->output;
  my $errpage = HTML::Template->new(filename => "$templatedir/dberr.tmpl");
  $errpage->param(errmsg => $msg);
  print $errpage->output;
  print $footer->output;
  exit;
}

# Load config pieces from the database.  Ideally all but the DB user/pass/etc should be loaded here.
initGlobals($dbh);

# security check - does the user have permission to view this entity?
# this is a prep step used "many" places
my @viewablegroups;
getChildren($dbh, $logingroup, \@viewablegroups, 'all');
push @viewablegroups, $logingroup;

my $page;
eval {
  # sigh.  can't set loop_context_vars or global_vars once instantiated.
  $page = HTML::Template->new(filename => "$templatedir/$webvar{page}.tmpl",
        loop_context_vars => 1, global_vars => 1);
};
if ($@) {
  my $msg = $@;
  $page = HTML::Template->new(filename => "$templatedir/badpage.tmpl");
  if (-e "$templatedir/$webvar{page}.tmpl") {
    $page->param(badtemplate => $q->escapeHTML($msg));
  } else {
    warn "Bad page $webvar{page} requested";
    $page->param(badpage => $q->escapeHTML($webvar{page}));
  }
  $webvar{page} = 'badpage';
}

# handle login redirect
if ($webvar{action}) {
  if ($webvar{action} eq 'login') {
    # Snag ACL/permissions here too

    my $userdata = login($dbh, $webvar{username}, $webvar{password});

    if ($userdata) {

      # set session bits
      $session->param('logingroup',$userdata->{group_id});
      $session->param('curgroup',$userdata->{group_id});
      $session->param('uid',$userdata->{user_id});
      $session->param('username',$webvar{username});

      changepage(page => "domlist");

    } else {
      $webvar{loginfailed} = 1;
    } # user data fetch check

  } elsif ($webvar{action} eq 'logout') {
    # delete the session
    $session->delete();
    $session->flush();

    my $newurl = "http://$ENV{HTTP_HOST}$ENV{SCRIPT_NAME}";
    $newurl =~ s|/[^/]+$|/|;
    print "Status: 302\nLocation: $newurl\n\n";
    exit;

  } elsif ($webvar{action} eq 'chgroup') {
    # fiddle session-stored group data
    # magic incantation to... uhhh...

    # ... and the "change group" bits...
    $uri_self =~ s/\&amp;group=[^&]*//g;

    # security check - does the user have permission to view this entity?
    my $errmsg;
    if (!(grep /^$webvar{group}$/, @viewablegroups)) {
      # hmm.  Reset the current group to the login group?  Yes.  Prevents confusing behaviour elsewhere.
      $session->param('curgroup',$logingroup);
      $webvar{group} = $logingroup;
      $curgroup = $logingroup;
      $errmsg = "You are not permitted to view or make changes in the requested group";
      $page->param(errmsg => $errmsg);
    }

    $session->param('curgroup', $webvar{group});
    $curgroup = ($webvar{group} ? $webvar{group} : $session->param('curgroup'));

    # I hate special cases.
##fixme: probably need to handle webvar{revrec}=='y' too
    if ($webvar{page} eq 'reclist' && $webvar{defrec} eq 'y') {
      my %args = (page => $webvar{page}, id => $curgroup, defrec => $webvar{defrec}, revrec => $webvar{revrec});
      $args{errmsg} = $errmsg if $errmsg;
      changepage(%args);
    }

  }
} # handle global webvar{action}s

# finally check if the user was disabled.  we could just leave this for logout/session expiry,
# but if they keep the session active they'll continue to have access long after being disabled.  :/
# Treat it as a session expiry.
if ($session->param('uid') && !userStatus($dbh, $session->param('uid')) ) {
  $sid = '';
  $session->delete;     # force expiry of the session Right Away
  $session->flush;      # make sure it hits storage
  changepage(page=> "login", sessexpired => 1);
}

# Misc Things To Do on most pages
initPermissions($dbh, $session->param('uid'));
initActionLog($dbh, $session->param('uid'));

$page->param(sid => $sid) unless $webvar{page} eq 'login';      # no session ID on the login page

if ($webvar{page} eq 'login') {

  $page->param(loginfailed => 1) if $webvar{loginfailed};
  $page->param(sessexpired => 1) if $webvar{sessexpired};
  $page->param(version => $DNSDB::VERSION);

} elsif ($webvar{page} eq 'domlist' or $webvar{page} eq 'index') {

  $page->param(domlist => 1);

# hmm.  seeing problems in some possibly-not-so-corner cases.
# this currently only handles "domain on", "domain off"
  if (defined($webvar{zonestatus})) {
    # security check - does the user have permission to access this entity?
    my $flag = 0;
    foreach (@viewablegroups) {
      $flag = 1 if isParent($dbh, $_, 'group', $webvar{id}, 'domain');
    }
    if ($flag && ($permissions{admin} || $permissions{domain_edit})) {
      my $stat = zoneStatus($dbh,$webvar{id},'n',$webvar{zonestatus});
      $page->param(resultmsg => $DNSDB::resultstr);
    } else {
      $page->param(errmsg => "You are not permitted to view or change the requested domain");
    }
    $uri_self =~ s/\&amp;zonestatus=[^&]*//g;   # clean up URL for stuffing into templates
  }

  show_msgs();

  $page->param(curpage => $webvar{page});

  listdomains();

} elsif ($webvar{page} eq 'newdomain') {

  changepage(page => "domlist", errmsg => "You are not permitted to add domains")
        unless ($permissions{admin} || $permissions{domain_create});

  $webvar{group} = $curgroup if !$webvar{group};
  fill_grouplist("grouplist", $webvar{group});
  fill_loclist();

  if ($session->param('add_failed')) {
    $session->clear('add_failed');
    $page->param(add_failed => 1);
    $page->param(errmsg => $session->param('errmsg'));
    $session->clear('errmsg');
    $page->param(domain => $webvar{domain});
    $page->param(addinactive => $webvar{makeactive} eq 'n');
  }

} elsif ($webvar{page} eq 'adddomain') {

  changepage(page => "domlist", errmsg => "You are not permitted to add domains")
        unless ($permissions{admin} || $permissions{domain_create});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{group}, type => 'group')) {
    $session->param('add_failed', 1);
##fixme:  domain a security risk for XSS?
    changepage(page => "newdomain", domain => $webvar{domain},
        errmsg => "You do not have permission to add a domain to the requested group");
  }

  $webvar{makeactive} = 0 if !defined($webvar{makeactive});

  my ($code,$msg) = addDomain($dbh,$webvar{domain},$webvar{group},($webvar{makeactive} eq 'on' ? 1 : 0));

  if ($code eq 'OK') {
    mailNotify($dbh, "New ".($webvar{makeactive} eq 'on' ? 'Active' : 'Inactive')." Domain Created",
        ($webvar{makeactive} eq 'on' ? 'Active' : 'Inactive').qq( domain "$webvar{domain}" added by ).
        $session->param("username"));
    changepage(page => "reclist", id => $msg);
  } else {
    $session->param('add_failed', 1);
##fixme:  domain a security risk for XSS?
    changepage(page => "newdomain", domain => $webvar{domain}, errmsg => $msg,
        makeactive => ($webvar{makeactive} ? 'y' : 'n'), group => $webvar{group});
  }

} elsif ($webvar{page} eq 'deldom') {

  changepage(page => "domlist", errmsg => "You are not permitted to delete domains")
        unless ($permissions{admin} || $permissions{domain_delete});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{id}, type => 'domain')) {
    changepage(page => "domlist", errmsg => "You do not have permission to delete the requested domain");
  }

  $page->param(id => $webvar{id});

  # first pass = confirm y/n (sorta)
  if (!defined($webvar{del})) {

    $page->param(del_getconf => 1);
    $page->param(domain => domainName($dbh,$webvar{id}));

  } elsif ($webvar{del} eq 'ok') {
    my $pargroup = parentID($dbh, (id => $webvar{id}, type => 'domain', revrec => $webvar{revrec}));
    my ($code,$msg) = delZone($dbh, $webvar{id}, $webvar{revrec});
    if ($code eq 'OK') {
      changepage(page => "domlist", resultmsg => $msg);
    } else {
      changepage(page => "domlist", errmsg => $msg);
    }

  } else {
    # cancelled.  whee!
    changepage(page => "domlist");
  }

} elsif ($webvar{page} eq 'revzones') {

  $webvar{revrec} = 'y';

  if (defined($webvar{zonestatus})) {
    # security check - does the user have permission to access this entity?
    my $flag = 0;
    foreach (@viewablegroups) {
      $flag = 1 if isParent($dbh, $_, 'group', $webvar{id}, 'revzone');
    }
    if ($flag && ($permissions{admin} || $permissions{domain_edit})) {
      my $stat = zoneStatus($dbh,$webvar{id},'y',$webvar{zonestatus});
      $page->param(resultmsg => $DNSDB::resultstr);
    } else {
      $page->param(errmsg => "You are not permitted to view or change the requested reverse zone");
    }
    $uri_self =~ s/\&amp;zonestatus=[^&]*//g;   # clean up URL for stuffing into templates
  }

  show_msgs();

  $page->param(curpage => $webvar{page});
  listzones();

} elsif ($webvar{page} eq 'newrevzone') {

## scope/access check - use domain settings?  invent new (bleh)
  changepage(page => "revzones", errmsg => "You are not permitted to add reverse zones")
       unless ($permissions{admin} || $permissions{domain_create});

  fill_grouplist("grouplist");

  # prepopulate revpatt with the matching default record
# getRecByName($dbh, (revrec => $webvar{revrec}, defrec => $webvar{defrec}, host => 'string'));

  if ($session->param('add_failed')) {
    $session->clear('add_failed');
    $page->param(errmsg => $session->param('errmsg'));
    $session->clear('errmsg');
    $page->param(revzone => $webvar{revzone});
    $page->param(revpatt => $webvar{revpatt});
  }

} elsif ($webvar{page} eq 'addrevzone') {

  changepage(page => "revzones", errmsg => "You are not permitted to add reverse zones")
       unless ($permissions{admin} || $permissions{domain_create});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{group}, type => 'group')) {
    changepage(page => "newrevzone", add_failed => 1, revzone => $webvar{revzone}, revpatt => $webvar{revpatt},
       errmsg => "You do not have permission to add a reverse zone to the requested group");
  }

  my ($code,$msg) = addRDNS($dbh, $webvar{revzone}, $webvar{revpatt}, $webvar{group},
        ($webvar{makeactive} eq 'on' ? 1 : 0));

  if ($code eq 'OK') {
    changepage(page => "reclist", id => $msg, revrec => 'y');
  } elsif ($code eq 'WARN') {
    changepage(page => "reclist", id => $msg, revrec => 'y', warnmsg => $DNSDB::resultstr);
  } else {
    $session->param('add_failed', 1);
    changepage(page => "newrevzone", revzone => $webvar{revzone}, revpatt => $webvar{revpatt}, errmsg => $msg);
  }

} elsif ($webvar{page} eq 'delrevzone') {

  changepage(page => "revzones", errmsg => "You are not permitted to delete reverse zones")
        unless ($permissions{admin} || $permissions{domain_delete});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{id}, type => 'revzone')) {
    changepage(page => "revzones", errmsg => "You do not have permission to delete the requested reverse zone");
  }

  $page->param(id => $webvar{id});

  # first pass = confirm y/n (sorta)
  if (!defined($webvar{del})) {

    $page->param(del_getconf => 1);
    $page->param(revzone => revName($dbh,$webvar{id}));

  } elsif ($webvar{del} eq 'ok') {
    my $pargroup = parentID($dbh, (id => $webvar{id}, type => 'revzone', revrec => $webvar{revrec}));
    my $zone = revName($dbh, $webvar{id});
    my ($code,$msg) = delZone($dbh, $webvar{id}, 'y');
    if ($code eq 'OK') {
      changepage(page => "revzones", resultmsg => $msg);
    } else {
      changepage(page => "revzones", errmsg => $msg);
    }

  } else {
    # cancelled.  whee!
    changepage(page => "revzones");
  }

} elsif ($webvar{page} eq 'reclist') {

  # security check - does the user have permission to view this entity?
  if (!check_scope(id => $webvar{id}, type =>
        ($webvar{defrec} eq 'y' ? 'group' : ($webvar{revrec} eq 'y' ? 'revzone' : 'domain')))) {
    $page->param(errmsg => "You are not permitted to view or change the requested ".
        ($webvar{defrec} eq 'y' ? "group's default records" :
                ($webvar{revrec} eq 'y' ? "reverse zone's records" : "domain's records")));
    $page->param(perm_err => 1);        # this causes the template to skip the record listing output.
    goto DONERECLIST;   # and now we skip filling in the content which is not printed due to perm_err above
  }

# hmm.  where do we send them?
  if ($webvar{defrec} eq 'y' && !$permissions{admin}) {
    $page->param(errmsg => "You are not permitted to edit default records");
    $page->param(perm_err => 1);
  } else {

    $page->param(mayeditsoa => $permissions{admin} || $permissions{domain_edit});
##fixme:  ACL needs pondering.  Does "edit domain" interact with record add/remove/etc?
# Note this seems to be answered "no" in Vega.
# ACLs
    $page->param(record_create  => ($permissions{admin} || $permissions{record_create}) );
# we don't have any general edit links on the page;  they're all embedded in the TMPL_LOOP
#    $page->param(record_edit   => ($permissions{admin} || $permissions{record_edit}) );
    $page->param(record_delete  => ($permissions{admin} || $permissions{record_delete}) );

  # Handle record list for both default records (per-group) and live domain records

    $page->param(defrec => $webvar{defrec});
    $page->param(revrec => $webvar{revrec});
    $page->param(id => $webvar{id});
    $page->param(curpage => $webvar{page});

    my $count = getRecCount($dbh, $webvar{defrec}, $webvar{revrec}, $webvar{id}, $filter);

    $sortby = 'host';
# sort/order
    $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
    $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

    $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
    $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

# set up the headers
    my @cols;
    my %colheads;
    if ($webvar{revrec} eq 'n') {
      @cols = ('host', 'type', 'val', 'distance', 'weight', 'port', 'ttl');
      %colheads = (host => 'Name', type => 'Type', val => 'Address',
        distance => 'Distance', weight => 'Weight', port => 'Port', ttl => 'TTL');
    } else {
      @cols = ('val', 'type', 'host', 'ttl');
      %colheads = (val => 'IP Address', type => 'Type', host => 'Hostname', ttl => 'TTL');
    }
    my %custom = (id => $webvar{id}, defrec => $webvar{defrec}, revrec => $webvar{revrec});
    fill_colheads($sortby, $sortorder, \@cols, \%colheads, \%custom);

# fill the page-count and first-previous-next-last-all details
    fill_pgcount($count,"records",
        ($webvar{defrec} eq 'y' ? "group ".groupName($dbh,$webvar{id}) : 
                ($webvar{revrec} eq 'y' ? revName($dbh,$webvar{id}) : domainName($dbh,$webvar{id}))
        ));
    fill_fpnla($count);  # should put some params on this sub...

    $page->param(defrec => $webvar{defrec});
    showzone($webvar{defrec}, $webvar{revrec}, $webvar{id});
    if ($webvar{defrec} eq 'n') {
      if ($webvar{revrec} eq 'n') {
        $page->param(logdom => 1);
      } else {
        $page->param(logrdns => 1);
      }
    }

    show_msgs();

  } # close "you can't edit default records" check

  # Yes, this is a GOTO target.  PTBHTTT.
  DONERECLIST: ;

} elsif ($webvar{page} eq 'record') {

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{id}, type =>
        ($webvar{defrec} eq 'y' ? ($webvar{revrec} eq 'y' ? 'defrevrec' : 'defrec') : 'record'))) {
    $page->param(perm_err => "You are not permitted to edit the requested record");
    goto DONEREC;
  }
  # round 2, check the parent.
  if (!check_scope(id => $webvar{parentid}, type =>
        ($webvar{defrec} eq 'y' ? 'group' : ($webvar{revrec} eq 'y' ? 'revzone' : 'domain')))) {
    my $msg = ($webvar{defrec} eq 'y' ?
        "You are not permitted to add or edit default records in the requested group" :
        "You are not permitted to add or edit records in the requested domain/zone");
    $page->param(perm_err => $msg);
    goto DONEREC;
  }

  $page->param(defrec => $webvar{defrec});
  $page->param(revrec => $webvar{revrec});
  $page->param(fwdzone => $webvar{revrec} eq 'n');

  if ($webvar{recact} eq 'new') {

    changepage(page => "reclist", errmsg => "You are not permitted to add records", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{record_create});

    $page->param(todo => "Add record");
    $page->param(recact => "add");
    $page->param(parentid => $webvar{parentid});

    fill_recdata();

    if ($webvar{defrec} eq 'n') {
      my $defloc = getZoneLocation($dbh, $webvar{revrec}, $webvar{parentid});
      fill_loclist($curgroup, $defloc);
    }

  } elsif ($webvar{recact} eq 'add') {

    changepage(page => "reclist", errmsg => "You are not permitted to add records", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{record_create});

    # location check - if user does not have record_locchg, set $webvar{location} to default location for zone
    my $parloc = getZoneLocation($dbh, $webvar{revrec}, $webvar{parentid});
    $webvar{location} = $parloc unless ($permissions{admin} || $permissions{record_locchg});

    my @recargs = ($dbh,$webvar{defrec},$webvar{revrec},$webvar{parentid},
        \$webvar{name},\$webvar{type},\$webvar{address},$webvar{ttl},$webvar{location});
    if ($webvar{type} == $reverse_typemap{MX} or $webvar{type} == $reverse_typemap{SRV}) {
      push @recargs, $webvar{distance};
      if ($webvar{type} == $reverse_typemap{SRV}) {
        push @recargs, $webvar{weight};
        push @recargs, $webvar{port};
      }
    }

    my ($code,$msg) = addRec(@recargs);

    if ($code eq 'OK' || $code eq 'WARN') {
      my %pageparams = (page => "reclist", id => $webvar{parentid},
        defrec => $webvar{defrec}, revrec => $webvar{revrec});
      $pageparams{warnmsg} = $msg."<br><br>\n".$DNSDB::resultstr if $code eq 'WARN';
      $pageparams{resultmsg} = $DNSDB::resultstr if $code eq 'OK';
      changepage(%pageparams);
    } else {
      $page->param(failed       => 1);
      $page->param(errmsg       => $msg);
      $page->param(wastrying    => "adding");
      $page->param(todo         => "Add record");
      $page->param(recact       => "add");
      $page->param(parentid     => $webvar{parentid});
      $page->param(id           => $webvar{id});
      fill_recdata();   # populate the form... er, mostly.
      if ($webvar{defrec} eq 'n') {
        fill_loclist($curgroup, $webvar{location});
      }
    }

  } elsif ($webvar{recact} eq 'edit') {

    changepage(page => "reclist", errmsg => "You are not permitted to edit records", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{record_edit});

    $page->param(todo           => "Update record");
    $page->param(recact         => "update");
    $page->param(parentid       => $webvar{parentid});
    $page->param(id             => $webvar{id});
    my $recdata = getRecLine($dbh, $webvar{defrec}, $webvar{revrec}, $webvar{id});
    $page->param(name           => $recdata->{host});
    $page->param(address        => $recdata->{val});
    $page->param(distance       => $recdata->{distance});
    $page->param(weight         => $recdata->{weight});
    $page->param(port           => $recdata->{port});
    $page->param(ttl            => $recdata->{ttl});
    $page->param(typelist       => getTypelist($dbh, $webvar{revrec}, $recdata->{type}));

    if ($webvar{defrec} eq 'n') {
      fill_loclist($curgroup, $recdata->{location});
    }

  } elsif ($webvar{recact} eq 'update') {

    changepage(page => "reclist", errmsg => "You are not permitted to edit records", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{record_edit});

    # retain old location if user doesn't have permission to fiddle locations
    my $oldrec = getRecLine($dbh, $webvar{defrec}, $webvar{revrec}, $webvar{id});
    $webvar{location} = $oldrec->{location} unless ($permissions{admin} || $permissions{record_locchg});

    my ($code,$msg) = updateRec($dbh,$webvar{defrec},$webvar{revrec},$webvar{id},$webvar{parentid},
        \$webvar{name},\$webvar{type},\$webvar{address},$webvar{ttl},$webvar{location},
        $webvar{distance},$webvar{weight},$webvar{port});

    if ($code eq 'OK' || $code eq 'WARN') {
      my %pageparams = (page => "reclist", id => $webvar{parentid},
        defrec => $webvar{defrec}, revrec => $webvar{revrec});
      $pageparams{warnmsg} = $msg."<br><br>\n".$DNSDB::resultstr if $code eq 'WARN';
      $pageparams{resultmsg} = $DNSDB::resultstr if $code eq 'OK';
      changepage(%pageparams);
    } else {
      $page->param(failed       => 1);
      $page->param(errmsg       => $msg);
      $page->param(wastrying    => "updating");
      $page->param(todo         => "Update record");
      $page->param(recact       => "update");
      $page->param(parentid     => $webvar{parentid});
      $page->param(id           => $webvar{id});
      fill_recdata();
    }
  }

  if ($webvar{defrec} eq 'y') {
    $page->param(dohere => "default records in group ".groupName($dbh,$webvar{parentid}));
  } else {
    $page->param(dohere => domainName($dbh,$webvar{parentid})) if $webvar{revrec} eq 'n';
    $page->param(dohere => revName($dbh,$webvar{parentid})) if $webvar{revrec} eq 'y';
  }

  # Yes, this is a GOTO target.  PTBHTTT.
  DONEREC: ;

} elsif ($webvar{page} eq 'delrec') {

  # This is a complete separate segment since it uses a different template from add/edit records above

  changepage(page => "reclist", errmsg => "You are not permitted to delete records", id => $webvar{parentid},
                defrec => $webvar{defrec}, revrec => $webvar{revrec})
        unless ($permissions{admin} || $permissions{record_delete});

  if (!check_scope(id => $webvar{id}, type =>
        ($webvar{defrec} eq 'y' ? ($webvar{revrec} eq 'y' ? 'defrevrec' : 'defrec') : 'record'))) {
    # redirect to domlist because we don't have permission for the entity requested
    changepage(page => 'domlist', revrec => $webvar{revrec},
        errmsg => "You do not have permission to delete records in the requested ".
        ($webvar{defrec} eq 'y' ? 'group' : 'domain'));
  }

  $page->param(id => $webvar{id});
  $page->param(defrec => $webvar{defrec});
  $page->param(revrec => $webvar{revrec});
  $page->param(parentid => $webvar{parentid});
  # first pass = confirm y/n (sorta)
  if (!defined($webvar{del})) {
    $page->param(del_getconf => 1);
    my $rec = getRecLine($dbh, $webvar{defrec}, $webvar{revrec}, $webvar{id});
    $page->param(host => $rec->{host});
    $page->param(ftype => $typemap{$rec->{type}});
    $page->param(recval => $rec->{val});
  } elsif ($webvar{del} eq 'ok') {
    my ($code,$msg) = delRec($dbh, $webvar{defrec}, $webvar{revrec}, $webvar{id});
    if ($code eq 'OK') {
      changepage(page => "reclist", id => $webvar{parentid}, defrec => $webvar{defrec},
                revrec => $webvar{revrec}, resultmsg => $msg);
    } else {
## need to find failure mode
      changepage(page => "reclist", id => $webvar{parentid}, defrec => $webvar{defrec},
                revrec => $webvar{revrec}, errmsg => $msg);
    }
  } else {
    changepage(page => "reclist", id => $webvar{parentid}, defrec => $webvar{defrec}, revrec => $webvar{revrec});
  }

} elsif ($webvar{page} eq 'editsoa') {

  # security check - does the user have permission to view this entity?
  # id is domain/revzone/group id
  if (!check_scope(id => $webvar{id}, type =>
        ($webvar{defrec} eq 'y' ? 'group' : ($webvar{revrec} eq 'y' ? 'revzone' : 'domain')))) {
    changepage(page => 'domlist', errmsg => "You do not have permission to edit the ".
        ($webvar{defrec} eq 'y' ? 'default ' : '')."SOA record for the requested ".
        ($webvar{defrec} eq 'y' ? 'group' : 'domain'));
  }

  if ($webvar{defrec} eq 'y') {
    changepage(page => "domlist", errmsg => "You are not permitted to edit default records")
        unless $permissions{admin};
  } else {
    changepage(page => "reclist", errmsg => "You are not permitted to edit domain SOA records", id => $webvar{id})
        unless ($permissions{admin} || $permissions{domain_edit});
  }

  fillsoa($webvar{defrec},$webvar{revrec},$webvar{id});

} elsif ($webvar{page} eq 'updatesoa') {

  # security check - does the user have permission to view this entity?
  # pass 1, record ID
  if (!check_scope(id => $webvar{recid}, type =>
        ($webvar{defrec} eq 'y' ? ($webvar{revrec} eq 'y' ? 'defrevrec' : 'defrec') : 'record'))) {
##fixme:  should we redirect to the requested record list page instead of the domain list?
    changepage(page => 'domlist', errmsg => "You do not have permission to edit the requested SOA record");
  }
  # pass 2, parent (group or domain) ID
  if (!check_scope(id => $webvar{id}, type =>
        ($webvar{defrec} eq 'y' ? 'group' : ($webvar{revrec} eq 'y' ? 'revzone' : 'domain')))) {
    changepage(page => ($webvar{revrec} eq 'y' ? 'revzones' : 'domlist'),
        errmsg => "You do not have permission to edit the ".
        ($webvar{defrec} eq 'y' ? 'default ' : '')."SOA record for the requested ".
        ($webvar{defrec} eq 'y' ? 'group' : ($webvar{revrec} eq 'y' ? 'reverse zone' : 'domain')) );
  }

  changepage(page => "reclist", errmsg => "You are not permitted to edit domain SOA records", id => $webvar{id})
        unless ($permissions{admin} || $permissions{domain_edit});

  my ($code, $msg) = updateSOA($dbh, $webvar{defrec}, $webvar{revrec},
        (contact => $webvar{contact}, prins => $webvar{prins}, refresh => $webvar{refresh},
        retry => $webvar{retry}, expire => $webvar{expire}, minttl => $webvar{minttl},
        ttl => $webvar{ttl}, id => $webvar{id}) );
  if ($code eq 'OK') {
    changepage(page => "reclist", id => $webvar{id}, defrec => $webvar{defrec}, revrec => $webvar{revrec},
        resultmsg => "SOA record updated");
  } else {
    $page->param(update_failed => 1);
    $page->param(msg => $msg);
    fillsoa($webvar{defrec}, $webvar{revrec}, $webvar{id}, 'w');
  }

} elsif ($webvar{page} eq 'grpman') {

  listgroups();

# Permissions!
  $page->param(addgrp => $permissions{admin} || $permissions{group_create});
  $page->param(edgrp => $permissions{admin} || $permissions{group_edit});
  $page->param(delgrp => $permissions{admin} || $permissions{group_delete});

  show_msgs();
  $page->param(curpage => $webvar{page});

} elsif ($webvar{page} eq 'newgrp') {

  changepage(page => "grpman", errmsg => "You are not permitted to add groups")
        unless ($permissions{admin} || $permissions{group_create});

  # do.. uhh.. stuff.. if we have no webvar{grpaction}
  if ($webvar{grpaction} && $webvar{grpaction} eq 'add') {

    # security check - does the user have permission to access this entity?
    if (!check_scope(id => $webvar{pargroup}, type => 'group')) {
      changepage(page => "grpman", errmsg => "You are not permitted to add a group to the requested parent group");
    }

    my %newperms;
    my $alterperms = 0;
    foreach (@permtypes) {
      $newperms{$_} = 0;
      if ($permissions{admin} || $permissions{$_}) { 
        $newperms{$_} = (defined($webvar{$_}) && $webvar{$_} eq 'on' ? 1 : 0);
      } else { 
        $alterperms = 1; 
      }
    }
    # not gonna provide the 4th param: template-or-clone flag, just yet
    my ($code,$msg) = addGroup($dbh, $webvar{newgroup}, $webvar{pargroup}, \%newperms);
    if ($code eq 'OK') {
      if ($alterperms) {
        changepage(page => "grpman", warnmsg => 
                "You can only grant permissions you hold.  New group $webvar{newgroup} added with reduced access.");
      } else {
        changepage(page => "grpman", resultmsg => "Added group $webvar{newgroup}");
      }
    } # fallthrough else
    # no point in doing extra work
    fill_permissions($page, \%newperms);
    $page->param(add_failed => 1);
    $page->param(errmsg => $msg);
    $page->param(newgroup => $webvar{newgroup});
    fill_grouplist('pargroup',$webvar{pargroup});
  } else {
    fill_grouplist('pargroup',$curgroup);
    # fill default permissions with immediate parent's current ones
    my %parperms;
    getPermissions($dbh, 'group', $curgroup, \%parperms);
    fill_permissions($page, \%parperms);
  }

} elsif ($webvar{page} eq 'delgrp') {

  changepage(page => "grpman", errmsg => "You are not permitted to delete groups", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{group_delete});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{id}, type => 'group')) {
    changepage(page => "grpman", errmsg => "You are not permitted to delete the requested group");
  }

  $page->param(id => $webvar{id});
  # first pass = confirm y/n (sorta)
  if (!defined($webvar{del})) {
    $page->param(del_getconf => 1);

##fixme
# do a check for "group has stuff in it", and splatter a big warning
# up along with an unchecked-by-default check box to YES DAMMIT DELETE THE WHOLE THING

  } elsif ($webvar{del} eq 'ok') {
    my ($code,$msg) = delGroup($dbh, $webvar{id});
    if ($code eq 'OK') {
##fixme: need to clean up log when deleting a major container
      changepage(page => "grpman", resultmsg => $msg);
    } else {
# need to find failure mode
      changepage(page => "grpman", errmsg => $msg);
    }
  } else {
    # cancelled.  whee!
    changepage(page => "grpman");
  }
  $page->param(delgroupname => groupName($dbh, $webvar{id}));

} elsif ($webvar{page} eq 'edgroup') {

  changepage(page => "grpman", errmsg => "You are not permitted to edit groups")
        unless ($permissions{admin} || $permissions{group_edit});

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{gid}, type => 'group')) {
    changepage(page => "grpman", errmsg => "You are not permitted to edit the requested group");
  }

  if ($webvar{grpaction} && $webvar{grpaction} eq 'updperms') {
    # extra safety check;  make sure user can't construct a URL to bypass ACLs
    my %curperms;
    getPermissions($dbh, 'group', $webvar{gid}, \%curperms);
    my %chperms;
    my $alterperms = 0;
    foreach (@permtypes) {
      $webvar{$_} = 0 if !defined($webvar{$_});
      $webvar{$_} = 1 if $webvar{$_} eq 'on';
      if ($permissions{admin} || $permissions{$_}) {
        $chperms{$_} = $webvar{$_} if $curperms{$_} ne $webvar{$_};
      } else {
        $alterperms = 1;
        $chperms{$_} = 0;
      }
    }
    # "Chained" permissions.  Some permissions imply others;  make sure they get set.
    foreach (keys %permchains) {
      if ($chperms{$_} && !$chperms{$permchains{$_}}) {
        $chperms{$permchains{$_}} = 1;
      }
    }
    my ($code,$msg) = changePermissions($dbh, 'group', $webvar{gid}, \%chperms);
    if ($code eq 'OK') {
      if ($alterperms) {
        changepage(page => "grpman", warnmsg =>
                "You can only grant permissions you hold.  Default permissions in group ".
                groupName($dbh, $webvar{gid})." updated with reduced access");
      } else {
        changepage(page => "grpman", resultmsg => $msg);
      }
    } # fallthrough else
    # no point in doing extra work
    fill_permissions($page, \%chperms);
    $page->param(errmsg => $msg);
  }
  $page->param(gid => $webvar{gid});
  $page->param(grpmeddle => groupName($dbh, $webvar{gid}));
  my %grpperms;
  getPermissions($dbh, 'group', $webvar{gid}, \%grpperms);
  fill_permissions($page, \%grpperms);

} elsif ($webvar{page} eq 'bulkdomain') {
  # Bulk operations on domains.  Note all but group move are available on the domain list.
##fixme:  do we care about bulk operations on revzones?  Move-to-group, activate, deactivate,
# and delete should all be much rarer for revzones than for domains.

  changepage(page => "domlist", errmsg => "You are not permitted to make bulk domain changes")
        unless ($permissions{admin} || $permissions{domain_edit} || $permissions{domain_create} || $permissions{domain_delete});

  fill_grouplist("grouplist");

  my $count = getZoneCount($dbh, (revrec => 'n', curgroup => $curgroup) );

  $page->param(curpage => $webvar{page});
  fill_pgcount($count,'domains',groupName($dbh,$curgroup));
  fill_fpnla($count);
  $page->param(perpage => $perpage);

  my $domlist = getZoneList($dbh, (revrec => 'n', curgroup => $curgroup) );
  my $rownum = 0;
  foreach my $dom (@{$domlist}) {
    delete $dom->{status};
    delete $dom->{group};
    $dom->{newrow} = (++$rownum) % 5 == 0;
  }

  $page->param(domtable => $domlist);
  # ACLs
  $page->param(maymove => ($permissions{admin} || ($permissions{domain_edit} && $permissions{domain_create} && $permissions{domain_delete})));
  $page->param(maystatus => $permissions{admin} || $permissions{domain_edit});
  $page->param(maydelete => $permissions{admin} || $permissions{domain_delete});

} elsif ($webvar{page} eq 'bulkchange') {

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{destgroup}, type => 'group')) {
    $page->param(errmsg => "You are not permitted to make bulk changes in the requested group");
    goto DONEBULK;
  }

  # per-action scope checks
  if ($webvar{bulkaction} eq 'move') {
    changepage(page => "domlist", errmsg => "You are not permitted to bulk-move domains")
        unless ($permissions{admin} || ($permissions{domain_edit} && $permissions{domain_create} && $permissions{domain_delete}));
    my $newgname = groupName($dbh,$webvar{destgroup});
    $page->param(action => "Move to group $newgname");
  } elsif ($webvar{bulkaction} eq 'deactivate' || $webvar{bulkaction} eq 'activate') {
    changepage(page => "domlist", errmsg => "You are not permitted to bulk-$webvar{bulkaction} domains")
        unless ($permissions{admin} || $permissions{domain_edit});
    $page->param(action => "$webvar{bulkaction} domains");
  } elsif ($webvar{bulkaction} eq 'delete') {
    changepage(page => "domlist", errmsg => "You are not permitted to bulk-delete domains")
        unless ($permissions{admin} || $permissions{domain_delete});
    $page->param(action => "$webvar{bulkaction} domains");
  } else {
    # unknown action, bypass actually doing anything.  it should not be possible in
    # normal operations, and anyone who meddles with the URL gets what they deserve.
    goto DONEBULK;
  } # move/(de)activate/delete if()

  my @bulkresults;
  # nngh.  due to alpha-sorting on the previous page, we can't use domid-numeric
  # order here, and since we don't have the domain names until we go around this
  # loop, we can't alpha-sort them here.  :(
  foreach (keys %webvar) {
    my %row;
    next unless $_ =~ /^dom_\d+$/;
    # second security check - does the user have permission to meddle with this domain?
    if (!check_scope(id => $webvar{$_}, type => 'domain')) {
      $row{domerr} = "You are not permitted to make changes to the requested domain";
      $row{domain} = $webvar{$_};
      push @bulkresults, \%row;
      next;
    }
    $row{domain} = domainName($dbh,$webvar{$_});

    # Do the $webvar{bulkaction}
    my ($code, $msg);
    ($code, $msg) = changeGroup($dbh, 'domain', $webvar{$_}, $webvar{destgroup})
        if $webvar{bulkaction} eq 'move';
    if ($webvar{bulkaction} eq 'deactivate' || $webvar{bulkaction} eq 'activate') {
      my $stat = zoneStatus($dbh,$webvar{$_},'n',($webvar{bulkaction} eq 'activate' ? 'domon' : 'domoff'));
      $code = (defined($stat) ? 'OK' : 'FAIL');
      $msg = (defined($stat) ? $DNSDB::resultstr : $DNSDB::errstr);
    }
    ($code, $msg) = delZone($dbh, $webvar{$_}, 'n')
        if $webvar{bulkaction} eq 'delete';

    # Set the result output from the action
    if ($code eq 'OK') {
      $row{domok} = $msg;
    } elsif ($code eq 'WARN') {
      $row{domwarn} = $msg;
    } else {
      $row{domerr} = $msg;
    }
    push @bulkresults, \%row;

  } # foreach (keys %webvar)
  $page->param(bulkresults => \@bulkresults);

  # Yes, this is a GOTO target.  PTHBTTT.
  DONEBULK: ;

} elsif ($webvar{page} eq 'useradmin') {

  if (defined($webvar{userstatus})) {
    # security check - does the user have permission to access this entity?
    my $flag = 0;
    foreach (@viewablegroups) {
      $flag = 1 if isParent($dbh, $_, 'group', $webvar{id}, 'user');
    }
    if ($flag && ($permissions{admin} || $permissions{user_edit} ||
        ($permissions{self_edit} && $webvar{id} == $session->param('uid')) )) {
      my $stat = userStatus($dbh,$webvar{id},$webvar{userstatus});
      $page->param(resultmsg => $DNSDB::resultstr);
    } else {
      $page->param(errmsg => "You are not permitted to view or change the requested user");
    }
    $uri_self =~ s/\&amp;userstatus=[^&]*//g;   # clean up URL for stuffing into templates
  }

  list_users();

# Permissions!
  $page->param(adduser => $permissions{admin} || $permissions{user_create});
# should we block viewing other users?  Vega blocks "editing"...
#  NB:  no "edit self" link as with groups here.  maybe there should be?
#  $page->param(eduser => $permissions{admin} || $permissions{user_edit});
  $page->param(deluser => $permissions{admin} || $permissions{user_delete});

  show_msgs();
  $page->param(curpage => $webvar{page});

} elsif ($webvar{page} eq 'user') {

  # All user add/edit actions fall through the same page, since there aren't
  # really any hard differences between the templates

  #fill_actypelist($webvar{accttype});
  fill_clonemelist();
  my %grpperms;
  getPermissions($dbh, 'group', $curgroup, \%grpperms);

  my $grppermlist = new HTML::Template(filename => "$templatedir/permlist.tmpl");
  my %noaccess;
  fill_permissions($grppermlist, \%grpperms, \%noaccess);
  $grppermlist->param(info => 1);
  $page->param(grpperms => $grppermlist->output);

  $page->param(is_admin => $permissions{admin});

  $webvar{useraction} = '' if !$webvar{useraction};

  if ($webvar{useraction} eq 'add' or $webvar{useraction} eq 'update') {

    $page->param(add => 1) if $webvar{useraction} eq 'add';

    # can't re-use $code and $msg for update if we want to be able to identify separate failure states
    my ($code,$code2,$msg,$msg2) = ('OK','OK','OK','OK');

    my $alterperms = 0; # flag iff we need to force custom permissions due to user's current access limits

    my %newperms;       # we're going to prefill the existing permissions, so we can change them.
    getPermissions($dbh, 'user', $webvar{uid}, \%newperms);

    if ($webvar{pass1} ne $webvar{pass2}) {
      $code = 'FAIL';
      $msg = "Passwords don't match";
    } else {

      # assemble a permission string - far simpler than trying to pass an
      # indeterminate set of permission flags individually

      # But first, we have to see if the user can add any particular
      # permissions;  otherwise we have a priviledge escalation.  Whee.

      if (!$permissions{admin}) {
        my %grpperms;
        getPermissions($dbh, 'group', $curgroup, \%grpperms);
        my $ret = comparePermissions(\%permissions, \%grpperms);
        if ($ret eq '<' || $ret eq '!') {
          # User's permissions are not a superset or equivalent to group.  Can't inherit
          # (and include access user doesn't currently have), so we force custom.
          $webvar{perms_type} = 'custom';
          $alterperms = 1;
        }
      }

      my $permstring;
      if ($webvar{perms_type} eq 'custom') {
        $permstring = 'C:';
        foreach (@permtypes) {
          if ($permissions{admin} || $permissions{$_}) {
            $permstring .= ",$_" if defined($webvar{$_}) && $webvar{$_} eq 'on';
            $newperms{$_} = (defined($webvar{$_}) && $webvar{$_} eq 'on' ? 1 : 0);
          }
        }
        $page->param(perm_custom => 1);
      } elsif ($permissions{admin} && $webvar{perms_type} eq 'clone') {
        $permstring = "c:$webvar{clonesrc}";
        getPermissions($dbh, 'user', $webvar{clonesrc}, \%newperms);
        $page->param(perm_clone => 1);
      } else {
        $permstring = 'i';
      }
      # "Chained" permissions.  Some permissions imply others;  make sure they get set.
      foreach (keys %permchains) {
        if ($newperms{$_} && !$newperms{$permchains{$_}}) {
          $newperms{$permchains{$_}} = 1;
          $permstring .= ",$permchains{$_}";
        }
      }
      if ($webvar{useraction} eq 'add') {
        changepage(page => "useradmin", errmsg => "You do not have permission to add new users")
                unless $permissions{admin} || $permissions{user_create};
        # no scope check;  user is created in the current group
        ($code,$msg) = addUser($dbh, $webvar{uname}, $curgroup, $webvar{pass1},
                ($webvar{makeactive} eq 'on' ? 1 : 0), $webvar{accttype}, $permstring,
                $webvar{fname}, $webvar{lname}, $webvar{phone});
      } else {
        changepage(page => "useradmin", errmsg => "You do not have permission to edit users")
                unless $permissions{admin} || $permissions{user_edit} || 
                        ($permissions{self_edit} && $session->param('uid') == $webvar{uid});
        # security check - does the user have permission to access this entity?
        if (!check_scope(id => $webvar{user}, type => 'user')) {
          changepage(page => "useradmin", errmsg => "You do not have permission to edit the requested user");
        }
# User update is icky.  I'd really like to do this in one atomic operation,
# but that gets hairy by either duplicating a **lot** of code in DNSDB.pm
# or self-torture trying to not commit the transaction until we're really done.
        # Allowing for changing group, but not coding web support just yet.
        ($code,$msg) = updateUser($dbh, $webvar{uid}, $webvar{uname}, $webvar{gid}, $webvar{pass1},
                ($webvar{makeactive} eq 'on' ? 1 : 0), $webvar{accttype},
                $webvar{fname}, $webvar{lname}, $webvar{phone});
        if ($code eq 'OK') {
          $newperms{admin} = 1 if $webvar{accttype} eq 'S';
          ($code2,$msg2) = changePermissions($dbh, 'user', $webvar{uid}, \%newperms, ($permstring eq 'i'));
        }
      }
    }

    if ($code eq 'OK' && $code2 eq 'OK') {
      my %pageparams = (page => "useradmin");
      if ($alterperms) {
        $pageparams{warnmsg} = "You can only grant permissions you hold.\nUser ".
                ($webvar{useraction} eq 'add' ? "$webvar{uname} added" : "info updated for $webvar{uname}").
                ".\nPermissions ".($webvar{useraction} eq 'add' ? 'added' : 'updated')." with reduced access.";
      } else {
        $pageparams{resultmsg} = "$msg".($webvar{useraction} eq 'add' ? '' : "\n$msg2");
      }
      changepage(%pageparams);

    # add/update failed:
    } else {
      $page->param(add_failed => 1);
      $page->param(action => $webvar{useraction});
      $page->param(set_permgroup => 1);
      if ($webvar{perms_type} eq 'inherit') {   # set permission class radio
        $page->param(perm_inherit => 1);
      } elsif ($webvar{perms_type} eq 'clone') {
        $page->param(perm_clone => 1);
      } else {
        $page->param(perm_custom => 1);
      }
      $page->param(uname => $webvar{uname});
      $page->param(fname => $webvar{fname});
      $page->param(lname => $webvar{lname});
      $page->param(pass1 => $webvar{pass1});
      $page->param(pass2 => $webvar{pass2});
      $page->param(errmsg => "User info updated but permissions update failed: $msg2") if $code eq 'OK';
      $page->param(errmsg => $msg) if $code ne 'OK';
      fill_permissions($page, \%newperms);
      fill_actypelist($webvar{accttype});
      fill_clonemelist();
    }

  } elsif ($webvar{useraction} eq 'edit') {

    changepage(page => "useradmin", errmsg => "You do not have permission to edit users")
        unless $permissions{admin} || $permissions{user_edit} ||
                ($permissions{self_edit} && $session->param('uid') == $webvar{user});

    # security check - does the user have permission to access this entity?
    if (!check_scope(id => $webvar{user}, type => 'user')) {
      changepage(page => "useradmin", errmsg => "You do not have permission to edit the requested user");
    }

    $page->param(set_permgroup => 1);
    $page->param(action => 'update');
    $page->param(uid => $webvar{user});
    fill_clonemelist();

    my $userinfo = getUserData($dbh,$webvar{user});
    fill_actypelist($userinfo->{type});
    # not using this yet, but adding it now means we can *much* more easily do so later.
    $page->param(gid => $userinfo->{group_id});

    my %curperms;
    getPermissions($dbh, 'user', $webvar{user}, \%curperms);
    fill_permissions($page, \%curperms);

    $page->param(uname => $userinfo->{username});
    $page->param(fname => $userinfo->{firstname});
    $page->param(lname => $userinfo->{lastname});
    $page->param(set_permgroup => 1);
    if ($userinfo->{inherit_perm}) {
      $page->param(perm_inherit => 1);
    } else {
      $page->param(perm_custom => 1);
    }
  } else {
    changepage(page => "useradmin", errmsg => "You are not allowed to add new users")
        unless $permissions{admin} || $permissions{user_create};
    # default is "new"
    $page->param(add => 1);
    $page->param(action => 'add');
    fill_permissions($page, \%grpperms);
    fill_actypelist();
  }

} elsif ($webvar{page} eq 'deluser') {

  changepage(page=> "useradmin", errmsg => "You are not allowed to delete users")
        unless $permissions{admin} || $permissions{user_delete};

  # security check - does the user have permission to access this entity?
  if (!check_scope(id => $webvar{id}, type => 'user')) {
    changepage(page => "useradmin", errmsg => "You are not permitted to delete the requested user");
  }

  $page->param(id => $webvar{id});
  # first pass = confirm y/n (sorta)
  if (!defined($webvar{del})) {
    $page->param(del_getconf => 1);
    $page->param(user => userFullName($dbh,$webvar{id}));
  } elsif ($webvar{del} eq 'ok') {
    my ($code,$msg) = delUser($dbh, $webvar{id});
    if ($code eq 'OK') {
      # success.  go back to the user list, do not pass "GO"
      changepage(page => "useradmin", resultmsg => $msg);
    } else {
      changepage(page => "useradmin", errmsg => $msg);
    }
  } else {
    # cancelled.  whee!
    changepage(page => "useradmin");
  }

} elsif ($webvar{page} eq 'loclist') {

  changepage(page => "domlist", errmsg => "You are not allowed access to this function")
        unless $permissions{admin} || $permissions{location_view};

  # security check - does the user have permission to access this entity?
#  if (!check_scope(id => $webvar{id}, type => 'loc')) {
#    changepage(page => "loclist", errmsg => "You are not permitted to <foo> the requested location/view");
#  }
  list_locations();
  show_msgs();

# Permissions!
  $page->param(addloc => $permissions{admin} || $permissions{location_create});
  $page->param(delloc => $permissions{admin} || $permissions{location_delete});

} elsif ($webvar{page} eq 'location') {

  changepage(page => "domlist", errmsg => "You are not allowed access to this function")
        unless $permissions{admin} || $permissions{location_view};

  # security check - does the user have permission to access this entity?
#  if (!check_scope(id => $webvar{id}, type => 'loc')) {
#    changepage(page => "loclist", errmsg => "You are not permitted to <foo> the requested location/view");
#  }

  if ($webvar{locact} eq 'new') {
    # uuhhmm....
  } elsif ($webvar{locact} eq 'add') {
    changepage(page => "loclist", errmsg => "You are not permitted to add locations/views", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{location_create});

    my ($code,$msg) = addLoc($dbh, $curgroup, $webvar{locname}, $webvar{comments}, $webvar{iplist});

    if ($code eq 'OK' || $code eq 'WARN') {
      my %pageparams = (page => "loclist", id => $webvar{parentid},
        defrec => $webvar{defrec}, revrec => $webvar{revrec});
      $pageparams{warnmsg} = $msg."<br><br>\n".$DNSDB::resultstr if $code eq 'WARN';
      $pageparams{resultmsg} = $DNSDB::resultstr if $code eq 'OK';
      changepage(%pageparams);
    } else {
      $page->param(failed       => 1);
      $page->param(errmsg       => $msg);
      $page->param(wastrying    => "adding");
      $page->param(todo         => "Add location/view");
      $page->param(locact       => "add");
      $page->param(id           => $webvar{id});
      $page->param(locname      => $webvar{locname});
      $page->param(comments     => $webvar{comments});
      $page->param(iplist       => $webvar{iplist});
    }

  } elsif ($webvar{locact} eq 'edit') {
    changepage(page => "loclist", errmsg => "You are not permitted to edit locations/views", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{location_edit});

    my $loc = getLoc($dbh, $webvar{loc});
    $page->param(wastrying      => "editing");
    $page->param(todo           => "Edit location/view");
    $page->param(locact         => "update");
    $page->param(id             => $webvar{loc});
    $page->param(locname        => $loc->{description});
    $page->param(comments       => $loc->{comments});
    $page->param(iplist         => $loc->{iplist});

  } elsif ($webvar{locact} eq 'update') {
    changepage(page => "loclist", errmsg => "You are not permitted to edit locations/views", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{location_edit});

    my ($code,$msg) = updateLoc($dbh, $webvar{id}, $curgroup, $webvar{locname}, $webvar{comments}, $webvar{iplist});

    if ($code eq 'OK') {
      changepage(page => "loclist", resultmsg => $msg);
    } else {
      $page->param(failed       => 1);
      $page->param(errmsg       => $msg);
      $page->param(wastrying    => "editing");
      $page->param(todo         => "Edit location/view");
      $page->param(locact       => "update");
      $page->param(id           => $webvar{loc});
      $page->param(locname      => $webvar{locname});
      $page->param(comments     => $webvar{comments});
      $page->param(iplist       => $webvar{iplist});
    }
  } else {
    changepage(page => "loclist", errmsg => "You are not permitted to add locations/views", id => $webvar{parentid})
        unless ($permissions{admin} || $permissions{location_create});

    $page->param(todo => "Add location/view");
    $page->param(locact => "add");
    $page->param(locname => ($webvar{locname} ? $webvar{locname} : ''));
    $page->param(iplist => ($webvar{iplist} ? $webvar{iplist} : ''));

    show_msgs();
  }

} elsif ($webvar{page} eq 'dnsq') {

  $page->param(qfor => $webvar{qfor}) if $webvar{qfor};
  $page->param(typelist => getTypelist($dbh, 'l', ($webvar{type} ? $webvar{type} : undef)));
  $page->param(nrecurse => $webvar{nrecurse}) if $webvar{nrecurse};
  $page->param(resolver => $webvar{resolver}) if $webvar{resolver};

  if ($webvar{qfor}) {
    my $resolv = Net::DNS::Resolver->new;
    $resolv->tcp_timeout(5);    # make me adjustable!
    $resolv->udp_timeout(5);    # make me adjustable!
    $resolv->recurse(0) if $webvar{nrecurse};
    $resolv->nameservers($webvar{resolver}) if $webvar{resolver};
    my $query = $resolv->query($webvar{qfor}, $typemap{$webvar{type}});
    if ($query) {

      $page->param(showresults => 1);

      my @answer;
      foreach my $rr ($query->answer) {
#       next unless $rr->type eq "A" or $rr->type eq 'NS';
        my %row;
        my ($host,$ttl,$class,$type,$data) =
                ($rr->string =~ /^([0-9a-zA-Z_.-]+)\s+(\d+)\s+([A-Za-z]+)\s+([A-Za-z]+)\s+(.+)$/s);
        $row{host} = $host;
        $row{ftype} = $type;
        $row{rdata} = ($type eq 'SOA' ? "<pre>$data</pre>" : $data);
        push @answer, \%row;
      }
      $page->param(answer => \@answer);

      my @additional;
      foreach my $rr ($query->additional) {
#       next unless $rr->type eq "A" or $rr->type eq 'NS';
        my %row;
        my ($host,$ttl,$class,$type,$data) =
                ($rr->string =~ /^([0-9a-zA-Z_.-]+)\s+(\d+)\s+([A-Za-z]+)\s+([A-Za-z]+)\s+(.+)$/);
        $row{host} = $host;
        $row{ftype} = $type;
        $row{rdata} = $data;
        push @additional, \%row;
      }
      $page->param(additional => \@additional);

      my @authority;
      foreach my $rr ($query->authority) {
#       next unless $rr->type eq "A" or $rr->type eq 'NS';
        my %row;
        my ($host,$ttl,$class,$type,$data) =
                ($rr->string =~ /^([0-9a-zA-Z_.-]+)\s+(\d+)\s+([A-Za-z]+)\s+([A-Za-z]+)\s+(.+)$/);
        $row{host} = $host;
        $row{ftype} = $type;
        $row{rdata} = $data;
        push @authority, \%row;
      }
      $page->param(authority => \@authority);

      $page->param(usedresolver => $resolv->answerfrom);
      $page->param(frtype => $typemap{$webvar{type}});

    } else {
      $page->param(errmsg => $resolv->errorstring);
    }
  }
  ## done DNS query

} elsif ($webvar{page} eq 'axfr') {

  changepage(page => "domlist", errmsg => "You are not permitted to import domains")
        unless ($permissions{admin} || $permissions{domain_create});

  # don't need this while we've got the dropdown in the menu.  hmm.
  fill_grouplist("grouplist");

  $page->param(ifrom => $webvar{ifrom}) if $webvar{ifrom};
  $page->param(rwsoa => $webvar{rwsoa}) if $webvar{rwsoa};
  $page->param(rwns => $webvar{rwns}) if $webvar{rwns};
  # This next one is arguably better on by default, but Breaking Things Is Bad, Mmmkay?
  $page->param(mergematching => $webvar{mergematching}) if $webvar{mergematching};
  $page->param(dominactive => 1) if (!$webvar{domactive} && $webvar{doit});     # eww.
  $page->param(importdoms => $webvar{importdoms}) if $webvar{importdoms};

  # shut up warning about uninitialized variable
  $webvar{doit} = '' if !defined($webvar{doit});

  if ($webvar{doit} eq 'y' && !$webvar{ifrom}) {
    $page->param(errmsg => "Need to set host to import from");
  } elsif ($webvar{doit} eq 'y' && !$webvar{importdoms}) {
    $page->param(errmsg => "Need domains to import");
  } elsif ($webvar{doit} eq 'y') {

    # security check - does the user have permission to access this entity?
    if (!check_scope(id => $webvar{group}, type => 'group')) {
      $page->param(errmsg => "You are not permitted to import domains into the requested group");
      goto DONEAXFR;
    }

    # Bizarre Things Happen when you AXFR a null-named zone.
    $webvar{importdoms} =~ s/^\s+//;
    my @domlist = split /\s+/, $webvar{importdoms};
    my @results;
    foreach my $domain (@domlist) {
      my %row;
      my ($code,$msg) = importAXFR($dbh, $webvar{ifrom}, $domain, $webvar{group},
        $webvar{zonestatus}, $webvar{rwsoa}, $webvar{rwns}, $webvar{mergematching});
      $row{domok} = $msg if $code eq 'OK';
      if ($code eq 'WARN') {
        $msg =~ s|\n|<br />|g;
        $row{domwarn} = $msg;
      }
      if ($code eq 'FAIL') {
        $msg =~ s|\n|<br />\n|g;
        $row{domerr} = $msg;
      }
      $msg = "<br />\n".$msg if $msg =~ m|<br />|;
      $row{domain} = $domain;
      push @results, \%row;
    }
    $page->param(axfrresults => \@results);
  }

  # Yes, this is a GOTO target.  PTBHTTT.
  DONEAXFR: ;

} elsif ($webvar{page} eq 'whoisq') {

  if ($webvar{qfor}) {
    use Net::Whois::Raw;
    use Text::Wrap;

# caching useful?
#$Net::Whois::Raw::CACHE_DIR = "/var/spool/pwhois/";
#$Net::Whois::Raw::CACHE_TIME = 60;

    my ($dominfo, $whois_server) = whois($webvar{qfor});
##fixme:  if we're given an IP, try rwhois as well as whois so we get the real final data

    # le sigh.  idjits spit out data without linefeeds...
    $Text::Wrap::columns = 88;

# &%$@%@# high-bit crap.  We should probably find a way to properly recode these
# instead of one-by-one.  Note CGI::Simple's escapeHTML() doesn't do more than
# the bare minimum.  :/
# Mainly an XHTML validation thing.
    $dominfo = $q->escapeHTML($dominfo);
    $dominfo =~ s/\xa9/\&copy;/g;
    $dominfo =~ s/\xae/\&reg;/g;

    $page->param(qfor => $webvar{qfor});
    $page->param(dominfo => wrap('','',$dominfo));
    $page->param(whois_server => $whois_server);
  } else {
    $page->param(errmsg => "Missing host or domain to query in WHOIS") if $webvar{askaway};
  }

} elsif ($webvar{page} eq 'log') {

  my $id = $curgroup;  # we do this because the group log may be called from (almost) any page,
                       # but the others are much more limited.  this is probably non-optimal.

  if ($webvar{ltype} && $webvar{ltype} eq 'user') {
##fixme:  where should we call this from?
    $id = $webvar{id};
    if (!check_scope(id => $id, type => 'user')) {
      $page->param(errmsg => "You are not permitted to view log entries for the requested user");
      goto DONELOG;
    }
    $page->param(logfor => 'user '.userFullName($dbh,$id));
  } elsif ($webvar{ltype} && $webvar{ltype} eq 'dom') {
    $id = $webvar{id};
    if (!check_scope(id => $id, type => 'domain')) {
      $page->param(errmsg => "You are not permitted to view log entries for the requested domain");
      goto DONELOG;
    }
    $page->param(logfor => 'domain '.domainName($dbh,$id));
  } elsif ($webvar{ltype} && $webvar{ltype} eq 'rdns') {
    $id = $webvar{id};
    if (!check_scope(id => $id, type => 'revzone')) {
      $page->param(errmsg => "You are not permitted to view log entries for the requested reverse zone");
      goto DONELOG;
    }
    $page->param(logfor => 'reverse zone '.revName($dbh,$id));
  } else {
    # Default to listing curgroup log
    $page->param(logfor => 'group '.groupName($dbh,$id));
    # note that scope limitations are applied via the change-group check;
    # group log is always for the "current" group
  }
  $webvar{ltype} = 'group' if !$webvar{ltype};
  my $lcount = getLogCount($dbh, (id => $id, logtype => $webvar{ltype})) or push @debugbits, $DNSDB::errstr;

  $page->param(id => $id);
  $page->param(ltype => $webvar{ltype});

  fill_fpnla($lcount);
  fill_pgcount($lcount, "log entries", '');
  $page->param(curpage => $webvar{page}.($webvar{ltype} ? "&amp;ltype=$webvar{ltype}" : ''));

  $sortby = 'stamp';
  $sortorder = 'DESC';  # newest-first;  although filtering is probably going to be more useful than sorting
# sort/order
  $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
  $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

  $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
  $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

  # Set up the column headings with the sort info
  my @cols = ('fname','username','entry','stamp');
  my %colnames = (fname => 'Name', username => 'Username/Email', entry => 'Log Entry', stamp => 'Date/Time');
  fill_colheads($sortby, $sortorder, \@cols, \%colnames);

##fixme:  increase per-page limit or use separate limit for log?  some ops give *lots* of entries...
  my $logentries = getLogEntries($dbh, (id => $id, logtype => $webvar{ltype},
        offset => $webvar{offset}, sortby => $sortby, sortorder => $sortorder));
  $page->param(logentries => $logentries);

##fixme:
# - filtering
# - show reverse zone column?
# - on log record creation, bundle "parented" log actions (eg, "AXFR record blah for domain foo",
#   or "Add record bar for new domain baz") into one entry (eg, "AXFR domain foo", "Add domain baz")?
#   need a way to expand this into the complete list, and to exclude "child" entries

  # scope check fail target
  DONELOG: ;

} # end $webvar{page} dance


# start output here so we can redirect pages.
print "Content-type: text/html\n\n", $header->output;

##common bits
# mostly things in the menu
if ($webvar{page} ne 'login' && $webvar{page} ne 'badpage') {
  $page->param(username => $session->param("username"));

  $page->param(group => $curgroup);
  $page->param(groupname => groupName($dbh,$curgroup));
  $page->param(logingrp => groupName($dbh,$logingroup));
  $page->param(logingrp_num => $logingroup);

##fixme
  $page->param(mayrdns => 1);

  $page->param(mayloc => ($permissions{admin} || $permissions{location_view}));

  $page->param(maydefrec => $permissions{admin});
  $page->param(mayimport => $permissions{admin} || $permissions{domain_create});
  $page->param(maybulk => $permissions{admin} || $permissions{domain_edit} || $permissions{domain_create} || $permissions{domain_delete});

  $page->param(chggrps => ($permissions{admin} || $permissions{group_create} || $permissions{group_edit} || $permissions{group_delete}));

  # group tree.  should go elsewhere, probably
  my $tmpgrplist = fill_grptree($logingroup,$curgroup);
  $page->param(grptree => $tmpgrplist);
  $page->param(subs => ($tmpgrplist ? 1 : 0));  # probably not useful to pass gobs of data in for a boolean
  $page->param(inlogingrp => $curgroup == $logingroup);

# fill in the URL-to-self
  $page->param(whereami => $uri_self);
}

if (@debugbits) {
  print "<pre>\n";
  foreach (@debugbits) { print; }
  print "</pre>\n";
}

# spit it out
print $page->output;

if ($debugenv) {
  print "<div id=\"debug\">webvar keys: <pre>\n";
  foreach my $key (keys %webvar) {
    print "key: $key\tval: $webvar{$key}\n";
  }
  print "</pre>\nsession:\n<pre>\n";
  my $sesdata = $session->dataref();
  foreach my $key (keys %$sesdata) {
    print "key: $key\tval: ".$sesdata->{$key}."\n";
  }
  print "</pre>\nENV:\n<pre>\n";
  foreach my $key (keys %ENV) {
    print "key: $key\tval: $ENV{$key}\n";
  }
  print "</pre></div>\n";
}

print $footer->output;

# as per the docs, Just In Case
$session->flush();

exit 0;


sub fill_grptree {
  my $root = shift;
  my $cur = shift;
  my $indent = shift || '    ';

  my @childlist;

  my $grptree = HTML::Template->new(filename => 'templates/grptree.tmpl');
  getChildren($dbh,$root,\@childlist,'immediate');
  return if $#childlist == -1;
  my @grouplist;
  foreach (@childlist) {
    my %row;
    $row{grpname} = groupName($dbh,$_);
    $row{grpnum} = $_;
    $row{whereami} = $uri_self;
    $row{curgrp} = ($_ == $cur);
    $row{expanded} = isParent($dbh, $_, 'group', $cur, 'group');
    $row{expanded} = 1 if $_ == $cur;
    $row{subs} = fill_grptree($_,$cur,$indent.'    ');
    $row{indent} = $indent;
    push @grouplist, \%row;
  }
  $grptree->param(indent => $indent);
  $grptree->param(treelvl => \@grouplist);
  return $grptree->output;
}

sub changepage {
  my %params = @_;      # think this works the way I want...

  # cross-site scripting fixup.  instead of passing error messages by URL/form
  # variable, put them in the session where the nasty user can't meddle.
  # these are done here since it's far simpler to pass them in from wherever
  # than set them locally everywhere.
  foreach my $sessme ('resultmsg','warnmsg','errmsg') {
    if (my $tmp = $params{$sessme}) {
      $tmp =~ s/^\n//;
      $tmp =~ s|\n|<br />\n|g;
      $session->param($sessme, $tmp);
      delete $params{$sessme};
    }
  }

  # handle user check
  my $newurl = "http://$ENV{HTTP_HOST}$ENV{SCRIPT_NAME}?sid=$sid";
  foreach (sort keys %params) {
    $newurl .= "&$_=".$q->url_encode($params{$_});
  }

  # Just In Case
  $session->flush();

  print "Status: 302\nLocation: $newurl\n\n";
  exit;
} # end changepage

# wrap up the usual suspects for result, warning, or error messages to be displayed
sub show_msgs {
  if ($session->param('resultmsg')) {
    $page->param(resultmsg => $session->param('resultmsg'));
    $session->clear('resultmsg');
  }
  if ($session->param('warnmsg')) {
    $page->param(warnmsg => $session->param('warnmsg'));
    $session->clear('warnmsg');
  }
  if ($session->param('errmsg')) {
    $page->param(errmsg => $session->param('errmsg'));
    $session->clear('errmsg');
  }
} # end show_msgs

sub fillsoa {
  my $defrec = shift;
  my $revrec = shift;
  my $id = shift;
  my $preserve = shift || 'd';  # Flag to use webvar fields or retrieve from database

  my $domname = ($defrec eq 'y' ? '' : "DOMAIN");

  $page->param(defrec   => $defrec);
  $page->param(revrec   => $revrec);

# i had a good reason to do this when I wrote it...
#  $page->param(domain  => $domname);
#  $page->param(group   => $DNSDB::group);
  $page->param(isgrp => 1) if $defrec eq 'y';
  $page->param(parent => ($defrec eq 'y' ? groupName($dbh, $id) :
        ($revrec eq 'n' ? domainName($dbh, $id) : revName($dbh, $id)) ) );

# defaults
  $page->param(defcontact       => $DNSDB::def{contact});
  $page->param(defns            => $DNSDB::def{prins});
  $page->param(defsoattl        => $DNSDB::def{soattl});
  $page->param(defrefresh       => $DNSDB::def{refresh});
  $page->param(defretry         => $DNSDB::def{retry});
  $page->param(defexpire        => $DNSDB::def{expire});
  $page->param(defminttl        => $DNSDB::def{minttl});

  $page->param(id       => $id);

  if ($preserve eq 'd') {
    # there are probably better ways to do this.  TMTOWTDI.
    my $soa = getSOA($dbh,$defrec,$revrec,$id);

    $page->param(prins  => ($soa->{prins} ? $soa->{prins} : $DNSDB::def{prins}));
    $page->param(contact        => ($soa->{contact} ? $soa->{contact} : $DNSDB::def{contact}));
    $page->param(refresh        => ($soa->{refresh} ? $soa->{refresh} : $DNSDB::def{refresh}));
    $page->param(retry  => ($soa->{retry} ? $soa->{retry} : $DNSDB::def{retry}));
    $page->param(expire => ($soa->{expire} ? $soa->{expire} : $DNSDB::def{expire}));
    $page->param(minttl => ($soa->{minttl} ? $soa->{minttl} : $DNSDB::def{minttl}));
    $page->param(ttl    => ($soa->{ttl} ? $soa->{ttl} : $DNSDB::def{soattl}));
  } else {
    $page->param(prins  => ($webvar{prins} ? $webvar{prins} : $DNSDB::def{prins}));
    $page->param(contact        => ($webvar{contact} ? $webvar{contact} : $DNSDB::def{contact}));
    $page->param(refresh        => ($webvar{refresh} ? $webvar{refresh} : $DNSDB::def{refresh}));
    $page->param(retry  => ($webvar{retry} ? $webvar{retry} : $DNSDB::def{retry}));
    $page->param(expire => ($webvar{expire} ? $webvar{expire} : $DNSDB::def{expire}));
    $page->param(minttl => ($webvar{minttl} ? $webvar{minttl} : $DNSDB::def{minttl}));
    $page->param(ttl    => ($webvar{ttl} ? $webvar{ttl} : $DNSDB::def{soattl}));
  }
}

sub showzone {
  my $def = shift;
  my $rev = shift;
  my $id = shift;

  # get the SOA first
  my $soa = getSOA($dbh,$def,$rev,$id);

  $page->param(contact  => $soa->{contact});
  $page->param(prins    => $soa->{prins});
  $page->param(refresh  => $soa->{refresh});
  $page->param(retry    => $soa->{retry});
  $page->param(expire   => $soa->{expire});
  $page->param(minttl   => $soa->{minttl});
  $page->param(ttl      => $soa->{ttl});

  my $foo2 = getDomRecs($dbh,$def,$rev,$id,$perpage,$webvar{offset},$sortby,$sortorder,$filter);

  my $row = 0;
  foreach my $rec (@$foo2) {
    $rec->{type} = $typemap{$rec->{type}};
    $rec->{row} = $row % 2;
    $rec->{defrec} = $def;
    $rec->{revrec} = $rev;
    $rec->{sid} = $webvar{sid};
    $rec->{id} = $id;
    $rec->{fwdzone} = $rev eq 'n';
    $rec->{distance} = 'n/a' unless ($rec->{type} eq 'MX' || $rec->{type} eq 'SRV'); 
    $rec->{weight} = 'n/a' unless ($rec->{type} eq 'SRV'); 
    $rec->{port} = 'n/a' unless ($rec->{type} eq 'SRV');
    $row++;
# ACLs
    $rec->{record_edit} = ($permissions{admin} || $permissions{record_edit});
    $rec->{record_delete} = ($permissions{admin} || $permissions{record_delete});
    $rec->{locname} = '' unless ($permissions{admin} || $permissions{location_view});
  }
  $page->param(reclist => $foo2);
}

sub fill_recdata {
  $page->param(typelist => getTypelist($dbh, $webvar{revrec}, $webvar{type}));

# le sigh.  we may get called with many empty %webvar keys
  no warnings qw( uninitialized );

##todo:  allow BIND-style bare names, ASS-U-ME that the name is within the domain?
# prefill <domain> or DOMAIN in "Host" space for new records
  if ($webvar{revrec} eq 'n') {
    my $domroot = ($webvar{defrec} eq 'y' ? 'DOMAIN' : domainName($dbh,$webvar{parentid}));
    $page->param(name   => ($webvar{name} ? $webvar{name} : $domroot));
    $page->param(address        => $webvar{address});
    $page->param(distance       => $webvar{distance})
        if ($webvar{type} == $reverse_typemap{MX} or $webvar{type} == $reverse_typemap{SRV});
    $page->param(weight => $webvar{weight}) if $webvar{type} == $reverse_typemap{SRV};
    $page->param(port   => $webvar{port}) if $webvar{type} == $reverse_typemap{SRV};
  } else {
    my $domroot = ($webvar{defrec} eq 'y' ? 'ADMINDOMAIN' : ".$config{domain}");
    $page->param(name   => ($webvar{name} ? $webvar{name} : $domroot));
    my $zname = ($webvar{defrec} eq 'y' ? 'ZONE' : revName($dbh,$webvar{parentid}));
    $zname =~ s|\d*/\d+$||;
    $page->param(address        => ($webvar{address} ? $webvar{address} : $zname));
  }
# retrieve the right ttl instead of falling (way) back to the hardcoded system default
  my $soa = getSOA($dbh,$webvar{defrec},$webvar{revrec},$webvar{parentid});
  $page->param(ttl      => ($webvar{ttl} ? $webvar{ttl} : $soa->{minttl}));
}

sub fill_actypelist {
  my $curtype = shift || 'u';

  my @actypes;

  my %row1 = (actypeval => 'u', actypename => 'user');
  $row1{typesel} = 1 if $curtype eq 'u';
  push @actypes, \%row1;

  my %row2 = (actypeval => 'S', actypename => 'superuser');
  $row2{typesel} = 1 if $curtype eq 'S';
  push @actypes, \%row2;

  $page->param(actypelist => \@actypes);
}

sub fill_clonemelist {
  # shut up some warnings, but don't stomp on caller's state
  local $webvar{clonesrc} = 0 if !defined($webvar{clonesrc});

  my $clones = getUserDropdown($dbh, $curgroup, $webvar{clonesrc});
  $page->param(clonesrc => $clones);
}

sub fill_fpnla {
  my $count = shift;
  if ($offset eq 'all') {
    $page->param(perpage => $perpage);
# uhm....
  } else {
    # all these bits only have sensible behaviour if offset is numeric. err, probably.
    if ($count > $perpage) {
      # if there are more results than the default, always show the "all" link
      $page->param(navall => 1);

      if ($offset > 0) {
        $page->param(navfirst => 1);
        $page->param(navprev => 1);
        $page->param(prevoffs => $offset-1);
      }

      # show "next" and "last" links if we're not on the last page of results
      if ( (($offset+1) * $perpage - $count) < 0 ) {
        $page->param(navnext => 1);
        $page->param(nextoffs => $offset+1);
        $page->param(navlast => 1);
        $page->param(lastoffs => int (($count-1)/$perpage));
      }
    } else {
      $page->param(onepage => 1);
    }
  }
} # end fill_fpnla()

sub fill_pgcount {
  my $pgcount = shift;
  my $pgtype = shift;
  my $parent = shift;

  # Fix display/UI bug where if you are not on the first page of the list, and
  # you add a search term or click one of the "starts with" links, you end up
  # on a page showing nothing.
  # For bonus points, this reverts to the original offset on clicking the "All" link (mostly)
  if ($offset ne 'all') {
    $offset-- while ($offset * $perpage) >= $pgcount;
  }

  $page->param(ntot => $pgcount);
  $page->param(nfirst => (($offset eq 'all' ? 0 : $offset)*$perpage+1));
  $page->param(npglast => ($offset eq 'all' ? $pgcount :
        ( (($offset+1)*$perpage) > $pgcount ? $pgcount : (($offset+1)*$perpage) )
        ));
  $page->param(pgtype => $pgtype);
  $page->param(parent => $parent);
  $page->param(filter => $filter);
} # end fill_pgcount()


sub listdomains { listzones(); }        # temp

sub listzones {
# ACLs
  $page->param(domain_create    => ($permissions{admin} || $permissions{domain_create}) );
  $page->param(domain_edit      => ($permissions{admin} || $permissions{domain_edit}) );
  $page->param(domain_delete    => ($permissions{admin} || $permissions{domain_delete}) );

  my @childgroups;
  getChildren($dbh, $curgroup, \@childgroups, 'all') if $searchsubs;
  my $childlist = join(',',@childgroups);

  my $count = getZoneCount($dbh, (childlist => $childlist, curgroup => $curgroup, revrec => $webvar{revrec},
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef) ) );

# fill page count and first-previous-next-last-all bits
  fill_pgcount($count,($webvar{revrec} eq 'n' ? 'domains' : 'revzones'),groupName($dbh,$curgroup));
  fill_fpnla($count);

# sort/order
  $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
  $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

  $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
  $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

# set up the headers
  my @cols = (($webvar{revrec} eq 'n' ? 'domain' : 'revnet'), 'status', 'group');
  my %colheads = (domain => 'Domain', revnet => 'Reverse Zone', status => 'Status', group => 'Group');
  fill_colheads($sortby, $sortorder, \@cols, \%colheads);

  # hack! hack! pthbttt.  have to rethink the status column storage,
  # or inactive comes "before" active.  *sigh*
  $sortorder = ($sortorder eq 'ASC' ? 'DESC' : 'ASC') if $sortby eq 'status';

# waffle, waffle - keep state on these as well as sortby, sortorder?
##fixme:  put this higher so the count doesn't get munched?
  $page->param("start$startwith" => 1) if $startwith && $startwith =~ /^(?:[a-z]|0-9)$/;

  $page->param(filter => $filter) if $filter;
  $page->param(searchsubs => $searchsubs) if $searchsubs;

  $page->param(group => $curgroup);

  my $zonelist = getZoneList($dbh, (childlist => $childlist, curgroup => $curgroup,
        revrec => $webvar{revrec},
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef),
        offset => $webvar{offset}, sortby => $sortby, sortorder => $sortorder
        ) );
# probably don't need this, keeping for reference for now
#  foreach (@$zonelist) {
#  }
  $page->param(domtable => $zonelist);
} # end listdomains()


sub listgroups {

# security check - does the user have permission to view this entity?
  if (!(grep /^$curgroup$/, @viewablegroups)) {
    # hmm.  Reset the current group to the login group?  Yes.  Prevents confusing behaviour elsewhere.
    $session->param('curgroup',$logingroup);
    $page->param(errmsg => "You are not permitted to view the requested group");
    $curgroup = $logingroup;
  }

  my @childgroups;
  getChildren($dbh, $curgroup, \@childgroups, 'all') if $searchsubs;
  my $childlist = join(',',@childgroups);

  my ($count) = getGroupCount($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef) ) );

# fill page count and first-previous-next-last-all bits
  fill_pgcount($count,"groups",'');
  fill_fpnla($count);

  $page->param(gid => $curgroup);

  $sortby = 'group';
# sort/order
  $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
  $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

  $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
  $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

# set up the headers
  my @cols = ('group','parent','nusers','ndomains','nrevzones');
  my %colnames = (group => 'Group', parent => 'Parent Group', nusers => 'Users', ndomains => 'Domains', nrevzones => 'Reverse Zones');
  fill_colheads($sortby, $sortorder, \@cols, \%colnames);

# waffle, waffle - keep state on these as well as sortby, sortorder?
  $page->param("start$startwith" => 1) if $startwith && $startwith =~ /^(?:[a-z]|0-9)$/;

  $page->param(filter => $filter) if $filter;
  $page->param(searchsubs => $searchsubs) if $searchsubs;

# munge sortby for columns in database
  $sortby = 'g.group_name' if $sortby eq 'group';
  $sortby = 'g2.group_name' if $sortby eq 'parent';

  my $glist = getGroupList($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef),
        offset => $webvar{offset}, sortby => $sortby, sortorder => $sortorder) );

  $page->param(grouptable => $glist);
} # end listgroups()


sub fill_grouplist {
  my $template_var = shift;
  my $cur = shift || $curgroup;

  # little recursive utility sub-sub
  sub getgroupdrop {
    my $root = shift;
    my $cur = shift;    # to tag the selected group
    my $grplist = shift;
    my $indent = shift || '&nbsp;&nbsp;&nbsp;&nbsp;';

    my @childlist;
    getChildren($dbh,$root,\@childlist,'immediate');
    return if $#childlist == -1;
    foreach (@childlist) {
      my %row;
      $row{groupval} = $_;
      $row{groupactive} = ($_ == $cur);
      $row{groupname} = $indent.groupName($dbh, $_);
      push @{$grplist}, \%row;
      getgroupdrop($_, $cur, $grplist, $indent.'&nbsp;&nbsp;&nbsp;&nbsp;');
    }
  }

  my @grouplist;
  push @grouplist, { groupval => $logingroup, groupactive => $logingroup == $curgroup,
        groupname => groupName($dbh, $logingroup) };
  getgroupdrop($logingroup, $curgroup, \@grouplist);

  $page->param("$template_var" => \@grouplist);
} # end fill_grouplist()


sub fill_loclist {
  my $cur = shift || $curgroup;
  my $defloc = shift || '';

  return unless ($permissions{admin} || $permissions{location_view});

  $page->param(location_view => ($permissions{admin} || $permissions{location_view}));

  if ($permissions{admin} || $permissions{record_locchg}) {
    my $loclist = getLocDropdown($dbh, $cur, $defloc);
    $page->param(record_locchg => 1);
    $page->param(loclist => $loclist);
  } else {
    my $loc = getLoc($dbh, $defloc);
    $page->param(loc_name => $loc->{description});
  }
} # end fill_loclist()


sub list_users {

  my @childgroups;
  getChildren($dbh, $curgroup, \@childgroups, 'all') if $searchsubs;
  my $childlist = join(',',@childgroups);

  my $count = getUserCount($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef) ) );

# fill page count and first-previous-next-last-all bits
  fill_pgcount($count,"users",'');
  fill_fpnla($count);

  $sortby = 'user';
# sort/order
  $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
  $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

  $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
  $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

# set up the headers
  my @cols = ('user','fname','type','group','status');
  my %colnames = (user => 'Username', fname => 'Full Name', type => 'Type', group => 'Group', status => 'Status');
  fill_colheads($sortby, $sortorder, \@cols, \%colnames);

# waffle, waffle - keep state on these as well as sortby, sortorder?
  $page->param("start$startwith" => 1) if $startwith && $startwith =~ /^(?:[a-z]|0-9)$/;

  $page->param(filter => $filter) if $filter;
  $page->param(searchsubs => $searchsubs) if $searchsubs;

  my $ulist = getUserList($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef),
        offset => $webvar{offset}, sortby => $sortby, sortorder => $sortorder) );
  # Some UI things need to be done to the list (unlike other lists)
  foreach my $u (@{$ulist}) {
    $u->{eduser} = ($permissions{admin} ||
        ($permissions{user_edit} && $u->{type} ne 'S') ||
        ($permissions{self_edit} && $u->{user_id} == $session->param('uid')) );
    $u->{deluser} = ($permissions{admin} || ($permissions{user_delete} && $u->{type} ne 'S'));
    $u->{type} = ($u->{type} eq 'S' ? 'superuser' : 'user');
  }
  $page->param(usertable => $ulist);
} # end list_users()


sub list_locations {

  my @childgroups;
  getChildren($dbh, $curgroup, \@childgroups, 'all') if $searchsubs;
  my $childlist = join(',',@childgroups);

  my $count = getLocCount($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef) ) );

# fill page count and first-previous-next-last-all bits
  fill_pgcount($count,"locations/views",'');
  fill_fpnla($count);

  $sortby = 'user';
# sort/order
  $session->param($webvar{page}.'sortby', $webvar{sortby}) if $webvar{sortby};
  $session->param($webvar{page}.'order', $webvar{order}) if $webvar{order};

  $sortby = $session->param($webvar{page}.'sortby') if $session->param($webvar{page}.'sortby');
  $sortorder = $session->param($webvar{page}.'order') if $session->param($webvar{page}.'order');

# set up the headers
  my @cols = ('description', 'iplist', 'group');
  my %colnames = (description => 'Location/View Name', iplist => 'Permitted IPs/Ranges', group => 'Group');
  fill_colheads($sortby, $sortorder, \@cols, \%colnames);

# waffle, waffle - keep state on these as well as sortby, sortorder?
  $page->param("start$startwith" => 1) if $startwith && $startwith =~ /^(?:[a-z]|0-9)$/;

  $page->param(filter => $filter) if $filter;
  $page->param(searchsubs => $searchsubs) if $searchsubs;

  my $loclist = getLocList($dbh, (childlist => $childlist, curgroup => $curgroup,
        filter => ($filter ? $filter : undef), startwith => ($startwith ? $startwith : undef),
        offset => $webvar{offset}, sortby => $sortby, sortorder => $sortorder) );
  # Some UI things need to be done to the list
  foreach my $l (@{$loclist}) {
    $l->{iplist} = "(All IPs)" if !$l->{iplist};
    $l->{edloc} = ($permissions{admin} || $permissions{loc_edit});
    $l->{delloc} = ($permissions{admin} || $permissions{loc_delete});
  }
  $page->param(loctable => $loclist);
} # end list_locations()


# Generate all of the glop necessary to add or not the appropriate marker/flag for
# the sort order and column in domain, user, group, and record lists
# Takes an array ref and hash ref
sub fill_colheads {
  my $sortby = shift;
  my $sortorder = shift;
  my $cols = shift;
  my $colnames = shift;
  my $custom = shift;

  my @headings;

  foreach my $col (@$cols) {
    my %coldata;
    $coldata{sid} = $sid;
    $coldata{page} = $webvar{page};
    $coldata{offset} = $webvar{offset} if $webvar{offset};
    $coldata{sortby} = $col;
    $coldata{colname} = $colnames->{$col};
    if ($col eq $sortby) {
      $coldata{order} = ($sortorder eq 'ASC' ? 'DESC' : 'ASC');
      $coldata{sortorder} = $sortorder;
    } else {
      $coldata{order} = 'ASC';
    }
    if ($custom) {
      foreach my $ckey (keys %$custom) {
        $coldata{$ckey} = $custom->{$ckey};
      }
    }
    push @headings, \%coldata;
  }

  $page->param(colheads => \@headings);

} # end fill_colheads()


# we have to do this in a variety of places;  let's make it consistent
sub fill_permissions {
  my $template = shift; # may need to do several sets on a single page
  my $permset = shift;  # hashref to permissions on object
  my $usercan = shift || \%permissions; # allow alternate user-is-allowed permission block

  foreach (@permtypes) {
    $template->param("may_$_" => ($usercan->{admin} || $usercan->{$_}));
    $template->param($_ => $permset->{$_});
  }
}

# so simple when defined as a sub instead of inline.  O_o
sub check_scope {
  my %args = @_;
  my $entity = $args{id} || 0;  # prevent the shooting of feet with SQL "... intcolumn = '' ..."
  my $entype = $args{type} || '';

  if ($entype eq 'group') {
    return 1 if grep /^$entity$/, @viewablegroups;
  } else {
    foreach (@viewablegroups) {
      return 1 if isParent($dbh, $_, 'group', $entity, $entype);
    }
  }
}