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dns-suite.js
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Fix A & AAAA, add CNAME Tests

This commit is contained in:
Drew Warren 2017-02-17 15:14:14 -07:00
parent 737b31fcc2
commit f44d8eed71
6 changed files with 71 additions and 11 deletions
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3
dns.packer.type.a.js
View File

@ -9,7 +9,8 @@ exports.DNS_PACKER_TYPE_A = function (ab, dv, total, record) {
}
// RDLENGTH
dv.setUint16(total, 4, false);
var IP_LEN = 4;
dv.setUint16(total, IP_LEN, false);
total += 2;
// RDATA

3
dns.packer.type.aaaa.js
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@ -25,7 +25,8 @@ exports.DNS_PACKER_TYPE_AAAA = function (ab, dv, total, record) {
});
// RDLENGTH
dv.setUint16(total, 16, false);
var IP_LEN = 16;
dv.setUint16(total, IP_LEN, false);
total += 2;
// RDATA

35
dns.packer.type.cname.js Normal file
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@ -0,0 +1,35 @@
(function (exports) {
'use strict';
// A 'CNAME' record is a 32-bit value representing the IP address
exports.DNS_PACKER_TYPE_CNAME = function (ab, dv, total, record) {
if (!record.data) {
throw new Error("no data for CNAME record");
}
var cnameLen = 0;
var rdLenIndex = total;
total += 2;
// RDATA
// i.e. 127.0.0.1 => 0x7F, 0x00, 0x00, 0x01
record.data.split('.').forEach(function (label) {
cnameLen += 1 + label.length;
dv.setUint8(total, label.length, false);
total += 1;
label.split('').forEach(function (ch) {
dv.setUint8(total, ch.charCodeAt(0), false);
total += 1;
});
});
// RDLENGTH
dv.setUint16(rdLenIndex, record.data.length + 1, false);
return total;
};
}('undefined' !== typeof window ? window : exports));

7
test/packer.type.a.js
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@ -1,7 +1,7 @@
'use strict';
var packer = require('../dns.packer.type.a.js').DNS_PACKER_TYPE_A;
var ab = new ArrayBuffer(4);
var ab = new ArrayBuffer(6); // 16-bit RDLENGTH + 32-bit address
var dv = new DataView(ab);
var total;
@ -16,11 +16,12 @@ dv.setUint32(0x0, 0xDDDDDDDD, false);
].forEach(function (ipv4) {
total = 0;
total = packer(ab, dv, total, { address: ipv4 });
if (0x04 !== total) {
if (0x06 !== total) {
console.error('unexpected total ' + total);
process.exit(1);
}
if (ipv4 !== new Uint8Array(ab).join('.')) {
// 0.4 is just a hacky way to account for the RDLENGTH
if ('0.4.' + ipv4 !== new Uint8Array(ab).join('.')) {
console.error("expected: ", ipv4);
console.error("actual: ", new Uint8Array(ab).join('.'));
process.exit(1);

13
test/packer.type.aaaa.js
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@ -1,7 +1,7 @@
'use strict';
var packer = require('../dns.packer.type.aaaa.js').DNS_PACKER_TYPE_AAAA;
var ab = new ArrayBuffer(20);
var ab = new ArrayBuffer(22);
var dv = new DataView(ab);
var total = 0;
@ -16,18 +16,19 @@ dv.setUint16(0xC, 0xDDDD, false);
dv.setUint16(0xE, 0xDDDD, false);
dv.setUint16(0x10, 0xDDDD, false);
dv.setUint16(0x12, 0xDDDD, false);
dv.setUint16(0x14, 0xDDDD, false);
[ [ '::1'
, [ 0xDD, 0xDD, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0xDD, 0xDD ].join(' ') ]
, [ 0xDD, 0xDD, 0x00, 0x10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0xDD, 0xDD ].join(' ') ]
, [ 'fe80::1'
, [ 0xDD, 0xDD, 0xFE, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0xDD, 0xDD ].join(' ') ]
, [ 0xDD, 0xDD, 0x00, 0x10, 0xFE, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0xDD, 0xDD ].join(' ') ]
, [ 'fd41:50ca:2169:f4e:5020:f756:ca4e:c3b5'
, [ 0xDD, 0xDD, 0xFD, 0x41, 0x50, 0xCA, 0x21, 0x69, 0x0F, 0x4E
, [ 0xDD, 0xDD, 0x00, 0x10, 0xFD, 0x41, 0x50, 0xCA, 0x21, 0x69, 0x0F, 0x4E
, 0x50, 0x20, 0xF7, 0x56, 0xCA, 0x4E, 0xC3, 0xB5, 0xDD, 0xDD ].join(' ') ]
].forEach(function (ipv6) {
total = 2; // leave leading 0x00
total = 2; // leave leading 0xDD
total = packer(ab, dv, total, { address: ipv6[0] });
if (0x12 !== total) {
if (0x14 !== total) {
console.error('unexpected total ' + total);
process.exit(1);
}

21
test/packer.type.cname.js Normal file
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@ -0,0 +1,21 @@
'use strict';
var packer = require('../dns.packer.type.cname.js').DNS_PACKER_TYPE_CNAME;
var ab = new ArrayBuffer(255); // max len per label is 63, max label sequence is 254 + null terminator
var dv = new DataView(ab);
var total = 0;
[ [ 'www.example.com'
, [ 0x00, 0x10, 0x03, 119, 119, 119, 0x07, 101, 120, 97, 109, 112, 108, 101, 0x03, 99, 111, 109 ].join(' ') ]
].forEach(function (cname) {
total = packer(ab, dv, total, { data: cname[0] });
ab = ab.slice(0, total);
// TODO: Check that total increments appropriately
if (cname[1] !== new Uint8Array(ab).join(' ')) {
console.error("expected: ", cname[1]);
console.error("actual: ", new Uint8Array(ab).join(' '));
process.exit(1);
}
});
console.log('PASS');