#!/usr/bin/perl
# save_export.cgi
# Save, create or delete an export

require './exports-lib.pl';
&ReadParse();
&lock_file($config{'exports_file'});
@exps = &list_exports();
local $nfsv = nfs_max_version("localhost");

if ($in{'delete'}) {
	# Deleting some export
	$exp = $exps[$in{'idx'}];
	&delete_export($exp);
	}
else {
	if (!$in{'new'}) {
		# Get old export
		$oldexp = $exps[$in{'idx'}];
		%opts = %{$oldexp->{'options'}};
	}

	# Validate and parse inputs
	&error_setup($text{'save_err'});
	$exp{'via_pfs'} = ($exp{'pfs'} ne "") ? $in{'via_pfs'} : 0;
	-d $in{'dir'} || &error(&text('save_edir', $in{'dir'}));
	$exp{'dir'} = $in{'dir'};
	$exp{'pfs'} = $in{'pfs'};
	$exp{'active'} = $in{'active'};
	
	if ($in{'mode'} == 0) { $exp{'host'} = "=public"; }
	elsif ($in{'mode'} == 1) {
		$in{'netgroup'} =~ /^\S+$/ ||
			&error($text{'save_enetgroup'});
		$exp{'host'} = '@'.$in{'netgroup'};
		}
	elsif ($in{'mode'} == 2) {
		&check_ipaddress($in{'network'}) ||
			&error(&text('save_enetwork', $in{'network'}));
		&check_ipaddress($in{'netmask'}) ||
			&error(&text('save_enetmask', $in{'netmask'}));
		$exp{'host'} = $in{'network'}."/".$in{'netmask'};
		}
	elsif ($in{'mode'} == 3) { $exp{'host'} = ""; }
        #Support for IPv6 address and prefix
        elsif ($in{'mode'} == 6){
                &check_ip6address($in{'address'}) ||
			&error(&text('save_eaddress', $in{'address'}));
                if(!($in{'prefix'}>0 && $in{'prefix'}<129)){
                        &error(&text('save_eprefix', $in{'prefix'}));
                }
                $exp{'host'} = $in{'address'}."/".$in{'prefix'};
        }
        else{
		$in{'host'} =~ /\*/ || &to_ipaddress($in{'host'}) ||
			&error(&text('save_ehost', $in{'host'}));
		$exp{'host'} = $in{'host'};
	}

	# Authentication is in the host name
	# with support for spkm-3 and lipkey (experimental in NFSv4)
	
	 @sec_to_name=('sys','krb5','krb5i','krb5p','spkm-3','spkm-3i','spkm-3p','lipkey','lipkeyi','lipkeyp');
	 
	 $string=$in{'the_flav'};	 
	 @sec_flav= split(/,/, $in{'the_flav'});
	 $str_flav="";
	 foreach $nb (@sec_flav){
	       if($nb==0){ $str_flav .= "*,";}
	       else{ $str_flav .= "gss/$sec_to_name[$nb],";} 
	 }
	 chop($str_flav);
	 $str_flav="" if($in{'nfsv'}<4);
	 
	 if ($exp{'host'} ne "" && $str_flav ne ""){
	    $exp{'host'}=$str_flav.":".$exp{'host'};
	 }
	 elsif ($exp{'host'} eq "" && $str_flav eq ""){
	    $exp{'host'}="*";
	 }
	 elsif ($exp{'host'} eq ""){
	    $exp{'host'}=$str_flav;
	 }

	# validate and parse options
	delete ($opts{'fsid'});
	$opts{'fsid'} = "0" if($in{'is_pfs'});
	
	delete($opts{'rw'}); delete($opts{'ro'});
	if ($in{'ro'}) {
	    $opts{'ro'} = "";
	} else {
	    $opts{'rw'} = "";
	}	
	delete($opts{'secure'}); delete($opts{'insecure'});
	$opts{'insecure'} = "" if ($in{'insecure'});

	delete($opts{'no_subtree_check'}); delete($opts{'subtree_check'});
	$opts{'no_subtree_check'} = "" if ($in{'no_subtree_check'});

	delete($opts{'nohide'}); delete($opts{'hide'});
	$opts{'nohide'} = "" if ($in{'nohide'});
	
	delete($opts{'sync'}); delete($opts{'async'});
	if ($in{'sync'}) {
	    $opts{'sync'} = "";
	} else {
	    $opts{'async'} = ""; 
	}
	
	delete($opts{'root_squash'}); delete($opts{'no_root_squash'});
	delete($opts{'all_squash'}); delete($opts{'no_all_squash'});
	$opts{'no_root_squash'} = "" if ($in{'squash'} == 0);
	$opts{'all_squash'} = "" if ($in{'squash'} == 2);

	if ($in{'anonuid_def'}) { delete($opts{'anonuid'}); }
	elsif ($in{'anonuid'} =~ /^-?[0-9]+$/) {
	    $opts{'anonuid'} = $in{'anonuid'}; }
	else { $opts{'anonuid'} = getpwnam($in{'anonuid'}); }

	if ($in{'anongid_def'}) { delete($opts{'anongid'}); }
	elsif ($in{'anongid'} =~ /^-?[0-9]+$/) {
	    $opts{'anongid'} = $in{'anongid'}; }
	else { $opts{'anongid'} = getgrnam($in{'anongid'}); }

	# NFSv2 specific options ---
	delete($opts{'link_relative'}); delete($opts{'link_absolute'});
	delete($opts{'noaccess'});
	delete($opts{'squash_uids'});
	delete($opts{'squash_gids'});
	delete($opts{'map_daemon'});

	if (nfs_max_version("localhost") == 2) {
	    $opts{'link_relative'} = "" if ($in{'link_relative'});
	    $opts{'noaccess'} = "" if ($in{'noaccess'});

	    if (!$in{'squash_uids_def'}) {
		if ($in{'squash_uids'} !~ /^[\d+\-\,]+$/) {
		    &error($text{'save_euids'});
		} else {
		    $opts{'squash_uids'} = $in{'squash_uids'};
		    $opts{'map_daemon'} = "";
		}
	    }
	    
	    if (!$in{'squash_gids_def'}) {
		if ($in{'squash_gids'} !~ /^[\d+\-\,]+$/) {
		    &error($text{'save_egids'});
		} else {
		    $opts{'squash_gids'} = $in{'squash_gids'};
		    $opts{'map_daemon'} = "";
		}
	    }
	}
	# ---

	$exp{'options'} = \%opts;
	if ($in{'new'}) {
	    if ($in{'is_pfs'} || $nfsv<4) {
		&create_export(\%exp);
	    } else {
		&create_export_in_root(\%exp);
	    }
	} else {
	    &modify_export(\%exp, $oldexp);
	}
    }
&unlock_file($config{'exports_file'});
if ($in{'delete'}) {
	&webmin_log("delete", "export", $exp->{'dir'}, $exp);
	}
elsif ($in{'new'}) {
	&webmin_log("create", "export", $exp{'dir'}, \%exp);
	}
else {
	&webmin_log("modify", "export", $exp{'dir'}, \%exp);
	}
&redirect("");