FM / dns-packet

/var/www/flurhymez/node_modules/dns-packet/

/var/www/flurhymez/node_modules/dns-packet

Name	Size	Mode	Actions
index.js	17833	0644	edit dl rm
LICENSE	1079	0644	edit dl rm
opcodes.js	1301	0644	edit dl rm
package.json	1692	0644	edit dl rm
rcodes.js	1270	0644	edit dl rm
README.md	3368	0644	edit dl rm
types.js	2578	0644	edit dl rm

Edit: /var/www/flurhymez/node_modules/dns-packet/index.js (17833B)

var types = require('./types')
var rcodes = require('./rcodes')
var opcodes = require('./opcodes')
var ip = require('ip')
var Buffer = require('safe-buffer').Buffer

var QUERY_FLAG = 0
var RESPONSE_FLAG = 1 << 15
var FLUSH_MASK = 1 << 15
var NOT_FLUSH_MASK = ~FLUSH_MASK
var QU_MASK = 1 << 15
var NOT_QU_MASK = ~QU_MASK

var name = exports.txt = exports.name = {}

name.encode = function (str, buf, offset) {
  if (!buf) buf = Buffer.alloc(name.encodingLength(str))
  if (!offset) offset = 0
  var oldOffset = offset

// strip leading and trailing .
  var n = str.replace(/^\.|\.$/gm, '')
  if (n.length) {
    var list = n.split('.')

for (var i = 0; i < list.length; i++) {
      var len = buf.write(list[i], offset + 1)
      buf[offset] = len
      offset += len + 1
    }
  }

buf[offset++] = 0

name.encode.bytes = offset - oldOffset
  return buf
}

name.encode.bytes = 0

name.decode = function (buf, offset) {
  if (!offset) offset = 0

var list = []
  var oldOffset = offset
  var len = buf[offset++]

if (len === 0) {
    name.decode.bytes = 1
    return '.'
  }
  if (len >= 0xc0) {
    var res = name.decode(buf, buf.readUInt16BE(offset - 1) - 0xc000)
    name.decode.bytes = 2
    return res
  }

while (len) {
    if (len >= 0xc0) {
      list.push(name.decode(buf, buf.readUInt16BE(offset - 1) - 0xc000))
      offset++
      break
    }

list.push(buf.toString('utf-8', offset, offset + len))
    offset += len
    len = buf[offset++]
  }

name.decode.bytes = offset - oldOffset
  return list.join('.')
}

name.decode.bytes = 0

name.encodingLength = function (n) {
  if (n === '.' || n === '..') return 1
  return Buffer.byteLength(n.replace(/^\.|\.$/gm, '')) + 2
}

var string = {}

string.encode = function (s, buf, offset) {
  if (!buf) buf = Buffer.alloc(string.encodingLength(s))
  if (!offset) offset = 0

var len = buf.write(s, offset + 1)
  buf[offset] = len
  string.encode.bytes = len + 1
  return buf
}

string.encode.bytes = 0

string.decode = function (buf, offset) {
  if (!offset) offset = 0

var len = buf[offset]
  var s = buf.toString('utf-8', offset + 1, offset + 1 + len)
  string.decode.bytes = len + 1
  return s
}

string.decode.bytes = 0

string.encodingLength = function (s) {
  return Buffer.byteLength(s) + 1
}

var header = {}

header.encode = function (h, buf, offset) {
  if (!buf) buf = header.encodingLength(h)
  if (!offset) offset = 0

var flags = (h.flags || 0) & 32767
  var type = h.type === 'response' ? RESPONSE_FLAG : QUERY_FLAG

buf.writeUInt16BE(h.id || 0, offset)
  buf.writeUInt16BE(flags | type, offset + 2)
  buf.writeUInt16BE(h.questions.length, offset + 4)
  buf.writeUInt16BE(h.answers.length, offset + 6)
  buf.writeUInt16BE(h.authorities.length, offset + 8)
  buf.writeUInt16BE(h.additionals.length, offset + 10)

return buf
}

header.encode.bytes = 12

header.decode = function (buf, offset) {
  if (!offset) offset = 0
  if (buf.length < 12) throw new Error('Header must be 12 bytes')
  var flags = buf.readUInt16BE(offset + 2)

return {
    id: buf.readUInt16BE(offset),
    type: flags & RESPONSE_FLAG ? 'response' : 'query',
    flags: flags & 32767,
    flag_qr: ((flags >> 15) & 0x1) === 1,
    opcode: opcodes.toString((flags >> 11) & 0xf),
    flag_auth: ((flags >> 10) & 0x1) === 1,
    flag_trunc: ((flags >> 9) & 0x1) === 1,
    flag_rd: ((flags >> 8) & 0x1) === 1,
    flag_ra: ((flags >> 7) & 0x1) === 1,
    flag_z: ((flags >> 6) & 0x1) === 1,
    flag_ad: ((flags >> 5) & 0x1) === 1,
    flag_cd: ((flags >> 4) & 0x1) === 1,
    rcode: rcodes.toString(flags & 0xf),
    questions: new Array(buf.readUInt16BE(offset + 4)),
    answers: new Array(buf.readUInt16BE(offset + 6)),
    authorities: new Array(buf.readUInt16BE(offset + 8)),
    additionals: new Array(buf.readUInt16BE(offset + 10))
  }
}

header.decode.bytes = 12

header.encodingLength = function () {
  return 12
}

var runknown = exports.unknown = {}

runknown.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(runknown.encodingLength(data))
  if (!offset) offset = 0

buf.writeUInt16BE(data.length, offset)
  data.copy(buf, offset + 2)

runknown.encode.bytes = data.length + 2
  return buf
}

runknown.encode.bytes = 0

runknown.decode = function (buf, offset) {
  if (!offset) offset = 0

var len = buf.readUInt16BE(offset)
  var data = buf.slice(offset + 2, offset + 2 + len)
  runknown.decode.bytes = len + 2
  return data
}

runknown.decode.bytes = 0

runknown.encodingLength = function (data) {
  return data.length + 2
}

var rns = exports.ns = {}

rns.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rns.encodingLength(data))
  if (!offset) offset = 0

name.encode(data, buf, offset + 2)
  buf.writeUInt16BE(name.encode.bytes, offset)
  rns.encode.bytes = name.encode.bytes + 2
  return buf
}

rns.encode.bytes = 0

rns.decode = function (buf, offset) {
  if (!offset) offset = 0

var len = buf.readUInt16BE(offset)
  var dd = name.decode(buf, offset + 2)

rns.decode.bytes = len + 2
  return dd
}

rns.decode.bytes = 0

rns.encodingLength = function (data) {
  return name.encodingLength(data) + 2
}

var rsoa = exports.soa = {}

rsoa.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rsoa.encodingLength(data))
  if (!offset) offset = 0

var oldOffset = offset
  offset += 2
  name.encode(data.mname, buf, offset)
  offset += name.encode.bytes
  name.encode(data.rname, buf, offset)
  offset += name.encode.bytes
  buf.writeUInt32BE(data.serial || 0, offset)
  offset += 4
  buf.writeUInt32BE(data.refresh || 0, offset)
  offset += 4
  buf.writeUInt32BE(data.retry || 0, offset)
  offset += 4
  buf.writeUInt32BE(data.expire || 0, offset)
  offset += 4
  buf.writeUInt32BE(data.minimum || 0, offset)
  offset += 4

buf.writeUInt16BE(offset - oldOffset - 2, oldOffset)
  rsoa.encode.bytes = offset - oldOffset
  return buf
}

rsoa.encode.bytes = 0

rsoa.decode = function (buf, offset) {
  if (!offset) offset = 0

var oldOffset = offset

var data = {}
  offset += 2
  data.mname = name.decode(buf, offset)
  offset += name.decode.bytes
  data.rname = name.decode(buf, offset)
  offset += name.decode.bytes
  data.serial = buf.readUInt32BE(offset)
  offset += 4
  data.refresh = buf.readUInt32BE(offset)
  offset += 4
  data.retry = buf.readUInt32BE(offset)
  offset += 4
  data.expire = buf.readUInt32BE(offset)
  offset += 4
  data.minimum = buf.readUInt32BE(offset)
  offset += 4

rsoa.decode.bytes = offset - oldOffset
  return data
}

rsoa.decode.bytes = 0

rsoa.encodingLength = function (data) {
  return 22 + name.encodingLength(data.mname) + name.encodingLength(data.rname)
}

var rtxt = exports.txt = exports.null = {}
var rnull = rtxt

rtxt.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rtxt.encodingLength(data))
  if (!offset) offset = 0

if (typeof data === 'string') data = Buffer.from(data)
  if (!data) data = Buffer.alloc(0)

var oldOffset = offset
  offset += 2

var len = data.length
  data.copy(buf, offset, 0, len)
  offset += len

buf.writeUInt16BE(offset - oldOffset - 2, oldOffset)
  rtxt.encode.bytes = offset - oldOffset
  return buf
}

rtxt.encode.bytes = 0

rtxt.decode = function (buf, offset) {
  if (!offset) offset = 0
  var oldOffset = offset
  var len = buf.readUInt16BE(offset)

offset += 2

var data = buf.slice(offset, offset + len)
  offset += len

rtxt.decode.bytes = offset - oldOffset
  return data
}

rtxt.decode.bytes = 0

rtxt.encodingLength = function (data) {
  if (!data) return 2
  return (Buffer.isBuffer(data) ? data.length : Buffer.byteLength(data)) + 2
}

var rhinfo = exports.hinfo = {}

rhinfo.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rhinfo.encodingLength(data))
  if (!offset) offset = 0

var oldOffset = offset
  offset += 2
  string.encode(data.cpu, buf, offset)
  offset += string.encode.bytes
  string.encode(data.os, buf, offset)
  offset += string.encode.bytes
  buf.writeUInt16BE(offset - oldOffset - 2, oldOffset)
  rhinfo.encode.bytes = offset - oldOffset
  return buf
}

rhinfo.encode.bytes = 0

rhinfo.decode = function (buf, offset) {
  if (!offset) offset = 0

var oldOffset = offset

var data = {}
  offset += 2
  data.cpu = string.decode(buf, offset)
  offset += string.decode.bytes
  data.os = string.decode(buf, offset)
  offset += string.decode.bytes
  rhinfo.decode.bytes = offset - oldOffset
  return data
}

rhinfo.decode.bytes = 0

rhinfo.encodingLength = function (data) {
  return string.encodingLength(data.cpu) + string.encodingLength(data.os) + 2
}

var rptr = exports.ptr = {}
var rcname = exports.cname = rptr
var rdname = exports.dname = rptr

rptr.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rptr.encodingLength(data))
  if (!offset) offset = 0

name.encode(data, buf, offset + 2)
  buf.writeUInt16BE(name.encode.bytes, offset)
  rptr.encode.bytes = name.encode.bytes + 2
  return buf
}

rptr.encode.bytes = 0

rptr.decode = function (buf, offset) {
  if (!offset) offset = 0

var data = name.decode(buf, offset + 2)
  rptr.decode.bytes = name.decode.bytes + 2
  return data
}

rptr.decode.bytes = 0

rptr.encodingLength = function (data) {
  return name.encodingLength(data) + 2
}

var rsrv = exports.srv = {}

rsrv.encode = function (data, buf, offset) {
  if (!buf) buf = Buffer.alloc(rsrv.encodingLength(data))
  if (!offset) offset = 0

buf.writeUInt16BE(data.priority || 0, offset + 2)
  buf.writeUInt16BE(data.weight || 0, offset + 4)
  buf.writeUInt16BE(data.port || 0, offset + 6)
  name.encode(data.target, buf, offset + 8)

var len = name.encode.bytes + 6
  buf.writeUInt16BE(len, offset)

rsrv.encode.bytes = len + 2
  return buf
}

rsrv.encode.bytes = 0

rsrv.decode = function (buf, offset) {
  if (!offset) offset = 0

var len = buf.readUInt16BE(offset)

var data = {}
  data.priority = buf.readUInt16BE(offset + 2)
  data.weight = buf.readUInt16BE(offset + 4)
  data.port = buf.readUInt16BE(offset + 6)
  data.target = name.decode(buf, offset + 8)

rsrv.decode.bytes = len + 2
  return data
}

rsrv.decode.bytes = 0

rsrv.encodingLength = function (data) {
  return 8 + name.encodingLength(data.target)
}

var rcaa = exports.caa = {}

rcaa.ISSUER_CRITICAL = 1 << 7

rcaa.encode = function (data, buf, offset) {
  var len = rcaa.encodingLength(data)

if (!buf) buf = Buffer.alloc(rcaa.encodingLength(data))
  if (!offset) offset = 0

if (data.issuerCritical) {
    data.flags = rcaa.ISSUER_CRITICAL
  }

buf.writeUInt16BE(len - 2, offset)
  offset += 2
  buf.writeUInt8(data.flags || 0, offset)
  offset += 1
  string.encode(data.tag, buf, offset)
  offset += string.encode.bytes
  buf.write(data.value, offset)
  offset += Buffer.byteLength(data.value)

rcaa.encode.bytes = len
  return buf
}

rcaa.encode.bytes = 0

rcaa.decode = function (buf, offset) {
  if (!offset) offset = 0

var len = buf.readUInt16BE(offset)
  offset += 2

var oldOffset = offset
  var data = {}
  data.flags = buf.readUInt8(offset)
  offset += 1
  data.tag = string.decode(buf, offset)
  offset += string.decode.bytes
  data.value = buf.toString('utf-8', offset, oldOffset + len)

data.issuerCritical = !!(data.flags & rcaa.ISSUER_CRITICAL)

rcaa.decode.bytes = len + 2

return data
}

rcaa.decode.bytes = 0

rcaa.encodingLength = function (data) {
  return string.encodingLength(data.tag) + string.encodingLength(data.value) + 2
}

var ra = exports.a = {}

ra.encode = function (host, buf, offset) {
  if (!buf) buf = Buffer.alloc(ra.encodingLength(host))
  if (!offset) offset = 0

buf.writeUInt16BE(4, offset)
  offset += 2
  ip.toBuffer(host, buf, offset)
  ra.encode.bytes = 6
  return buf
}

ra.encode.bytes = 0

ra.decode = function (buf, offset) {
  if (!offset) offset = 0

offset += 2
  var host = ip.toString(buf, offset, 4)
  ra.decode.bytes = 6
  return host
}

ra.decode.bytes = 0

ra.encodingLength = function () {
  return 6
}

var raaaa = exports.aaaa = {}

raaaa.encode = function (host, buf, offset) {
  if (!buf) buf = Buffer.alloc(raaaa.encodingLength(host))
  if (!offset) offset = 0

buf.writeUInt16BE(16, offset)
  offset += 2
  ip.toBuffer(host, buf, offset)
  raaaa.encode.bytes = 18
  return buf
}

raaaa.encode.bytes = 0

raaaa.decode = function (buf, offset) {
  if (!offset) offset = 0

offset += 2
  var host = ip.toString(buf, offset, 16)
  raaaa.decode.bytes = 18
  return host
}

raaaa.decode.bytes = 0

raaaa.encodingLength = function () {
  return 18
}

var renc = exports.record = function (type) {
  switch (type.toUpperCase()) {
    case 'A': return ra
    case 'PTR': return rptr
    case 'CNAME': return rcname
    case 'DNAME': return rdname
    case 'TXT': return rtxt
    case 'NULL': return rnull
    case 'AAAA': return raaaa
    case 'SRV': return rsrv
    case 'HINFO': return rhinfo
    case 'CAA': return rcaa
    case 'NS': return rns
    case 'SOA': return rsoa
  }
  return runknown
}

var answer = exports.answer = {}

answer.encode = function (a, buf, offset) {
  if (!buf) buf = Buffer.alloc(answer.encodingLength(a))
  if (!offset) offset = 0

var oldOffset = offset

name.encode(a.name, buf, offset)
  offset += name.encode.bytes

buf.writeUInt16BE(types.toType(a.type), offset)

var klass = a.class === undefined ? 1 : a.class
  if (a.flush) klass |= FLUSH_MASK // the 1st bit of the class is the flush bit
  buf.writeUInt16BE(klass, offset + 2)

buf.writeUInt32BE(a.ttl || 0, offset + 4)

var enc = renc(a.type)
  enc.encode(a.data, buf, offset + 8)
  offset += 8 + enc.encode.bytes

answer.encode.bytes = offset - oldOffset
  return buf
}

answer.encode.bytes = 0

answer.decode = function (buf, offset) {
  if (!offset) offset = 0

var a = {}
  var oldOffset = offset

a.name = name.decode(buf, offset)
  offset += name.decode.bytes
  a.type = types.toString(buf.readUInt16BE(offset))
  a.class = buf.readUInt16BE(offset + 2)
  a.ttl = buf.readUInt32BE(offset + 4)

a.flush = !!(a.class & FLUSH_MASK)
  if (a.flush) a.class &= NOT_FLUSH_MASK

var enc = renc(a.type)
  a.data = enc.decode(buf, offset + 8)
  offset += 8 + enc.decode.bytes

answer.decode.bytes = offset - oldOffset
  return a
}

answer.decode.bytes = 0

answer.encodingLength = function (a) {
  return name.encodingLength(a.name) + 8 + renc(a.type).encodingLength(a.data)
}

var question = exports.question = {}

question.encode = function (q, buf, offset) {
  if (!buf) buf = Buffer.alloc(question.encodingLength(q))
  if (!offset) offset = 0

var oldOffset = offset

name.encode(q.name, buf, offset)
  offset += name.encode.bytes

buf.writeUInt16BE(types.toType(q.type), offset)
  offset += 2

buf.writeUInt16BE(q.class === undefined ? 1 : q.class, offset)
  offset += 2

question.encode.bytes = offset - oldOffset
  return q
}

question.encode.bytes = 0

question.decode = function (buf, offset) {
  if (!offset) offset = 0

var oldOffset = offset
  var q = {}

q.name = name.decode(buf, offset)
  offset += name.decode.bytes

q.type = types.toString(buf.readUInt16BE(offset))
  offset += 2

q.class = buf.readUInt16BE(offset)
  offset += 2

var qu = !!(q.class & QU_MASK)
  if (qu) q.class &= NOT_QU_MASK

question.decode.bytes = offset - oldOffset
  return q
}

question.decode.bytes = 0

question.encodingLength = function (q) {
  return name.encodingLength(q.name) + 4
}

exports.AUTHORITATIVE_ANSWER = 1 << 10
exports.TRUNCATED_RESPONSE = 1 << 9
exports.RECURSION_DESIRED = 1 << 8
exports.RECURSION_AVAILABLE = 1 << 7
exports.AUTHENTIC_DATA = 1 << 5
exports.CHECKING_DISABLED = 1 << 4

exports.encode = function (result, buf, offset) {
  var allocing = !buf
  if (allocing) buf = Buffer.alloc(exports.encodingLength(result))
  if (!offset) offset = 0

var oldOffset = offset

if (!result.questions) result.questions = []
  if (!result.answers) result.answers = []
  if (!result.authorities) result.authorities = []
  if (!result.additionals) result.additionals = []

header.encode(result, buf, offset)
  offset += header.encode.bytes

offset = encodeList(result.questions, question, buf, offset)
  offset = encodeList(result.answers, answer, buf, offset)
  offset = encodeList(result.authorities, answer, buf, offset)
  offset = encodeList(result.additionals, answer, buf, offset)

exports.encode.bytes = offset - oldOffset

// just a quick sanity check
  if (allocing && exports.encode.bytes !== buf.length) {
    return buf.slice(0, exports.encode.bytes)
  }

return buf
}

exports.encode.bytes = 0

exports.decode = function (buf, offset) {
  if (!offset) offset = 0

var oldOffset = offset
  var result = header.decode(buf, offset)
  offset += header.decode.bytes

offset = decodeList(result.questions, question, buf, offset)
  offset = decodeList(result.answers, answer, buf, offset)
  offset = decodeList(result.authorities, answer, buf, offset)
  offset = decodeList(result.additionals, answer, buf, offset)

exports.decode.bytes = offset - oldOffset

return result
}

exports.decode.bytes = 0

exports.encodingLength = function (result) {
  return header.encodingLength(result) +
    encodingLengthList(result.questions || [], question) +
    encodingLengthList(result.answers || [], answer) +
    encodingLengthList(result.authorities || [], answer) +
    encodingLengthList(result.additionals || [], answer)
}

function encodingLengthList (list, enc) {
  var len = 0
  for (var i = 0; i < list.length; i++) len += enc.encodingLength(list[i])
  return len
}

function encodeList (list, enc, buf, offset) {
  for (var i = 0; i < list.length; i++) {
    enc.encode(list[i], buf, offset)
    offset += enc.encode.bytes
  }
  return offset
}

function decodeList (list, enc, buf, offset) {
  for (var i = 0; i < list.length; i++) {
    list[i] = enc.decode(buf, offset)
    offset += enc.decode.bytes
  }
  return offset
}

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