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/*
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NetUtils.js
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part of pfSense (https://www.pfsense.org)
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Various helper functions for IPv6 support.
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Copyright (C) 2007 Simon Cornelius P. Umacob <simoncpu@gmail.com>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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function NetUtils_changeIPVersionMask(field, version) {
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switch(version){
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case 'IPv4':
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NetUtils_clearOptions(document.getElementById(field));
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NetUtils_loadMaskIPv4(document.getElementById(field), 32);
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break;
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case 'IPv6':
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NetUtils_clearOptions(document.getElementById(field));
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NetUtils_loadMaskIPv6(document.getElementById(field), 64);
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break;
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case 'IPv4_net':
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NetUtils_clearOptions(document.getElementById(field));
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NetUtils_loadMaskIPv4(document.getElementById(field), 32, 1, 31);
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break;
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case 'IPv6_net':
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NetUtils_clearOptions(document.getElementById(field));
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NetUtils_loadMaskIPv6(document.getElementById(field), 64, 1, 63);
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break;
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}
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}
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function NetUtils_clearOptions(obj) {
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var len = obj.length;
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for (var i = 0; i < len; i++) {
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obj[0] = null;
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}
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}
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function NetUtils_loadMaskIPv4(obj, sel, min, max) {
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var min,
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max,
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j = 0;
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min = min == undefined ? 1 : min;
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max = max == undefined ? 32 : max;
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for (var i = max; i >= min; i--) {
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obj[j] = new Option(i, i);
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if (sel == i) {
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obj[j].selected = true;
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}
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j++;
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}
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}
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function NetUtils_loadMaskIPv6(obj, sel, min, max) {
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var min,
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max,
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j = 0;
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min = min == undefined ? 1 : min;
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max = max == undefined ? 64 : max;
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if ((max % 4) != 0) {
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obj[j++] = new Option(max, max);
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/**
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* NOTE: This solution is a kludge.
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* If you have a better way, don't hesitate
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* to change this. Please send patches. :)
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*/
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for (var i = 1; i <= 3; i++) {
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if (((max - i) % 4) == 0) {
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max = max - i;
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break;
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}
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}
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}
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for (var i = max; i >= min; i -= 4) {
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obj[j] = new Option(i, i);
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if (sel == i) {
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obj[j].selected = true;
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}
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j++;
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}
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}
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