FM / proxy-addr

/var/www/qr4y.gr/server/delivery/node_modules/proxy-addr/

/var/www/qr4y.gr/server/delivery/node_modules/proxy-addr

Name	Size	Mode	Actions
HISTORY.md	2991	0644	edit dl rm
index.js	6000	0644	edit dl rm
LICENSE	1094	0644	edit dl rm
package.json	2229	0644	edit dl rm
README.md	4131	0644	edit dl rm

Edit: /var/www/qr4y.gr/server/delivery/node_modules/proxy-addr/index.js (6000B)

/*!
 * proxy-addr
 * Copyright(c) 2014-2016 Douglas Christopher Wilson
 * MIT Licensed
 */

'use strict'

/**
 * Module exports.
 * @public
 */

module.exports = proxyaddr
module.exports.all = alladdrs
module.exports.compile = compile

/**
 * Module dependencies.
 * @private
 */

var forwarded = require('forwarded')
var ipaddr = require('ipaddr.js')

/**
 * Variables.
 * @private
 */

var DIGIT_REGEXP = /^[0-9]+$/
var isip = ipaddr.isValid
var parseip = ipaddr.parse

/**
 * Pre-defined IP ranges.
 * @private
 */

var IP_RANGES = {
  linklocal: ['169.254.0.0/16', 'fe80::/10'],
  loopback: ['127.0.0.1/8', '::1/128'],
  uniquelocal: ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fc00::/7']
}

/**
 * Get all addresses in the request, optionally stopping
 * at the first untrusted.
 *
 * @param {Object} request
 * @param {Function|Array|String} [trust]
 * @public
 */

function alladdrs (req, trust) {
  // get addresses
  var addrs = forwarded(req)

if (!trust) {
    // Return all addresses
    return addrs
  }

if (typeof trust !== 'function') {
    trust = compile(trust)
  }

for (var i = 0; i < addrs.length - 1; i++) {
    if (trust(addrs[i], i)) continue

addrs.length = i + 1
  }

return addrs
}

/**
 * Compile argument into trust function.
 *
 * @param {Array|String} val
 * @private
 */

function compile (val) {
  if (!val) {
    throw new TypeError('argument is required')
  }

var trust

if (typeof val === 'string') {
    trust = [val]
  } else if (Array.isArray(val)) {
    trust = val.slice()
  } else {
    throw new TypeError('unsupported trust argument')
  }

for (var i = 0; i < trust.length; i++) {
    val = trust[i]

if (!Object.prototype.hasOwnProperty.call(IP_RANGES, val)) {
      continue
    }

// Splice in pre-defined range
    val = IP_RANGES[val]
    trust.splice.apply(trust, [i, 1].concat(val))
    i += val.length - 1
  }

return compileTrust(compileRangeSubnets(trust))
}

/**
 * Compile `arr` elements into range subnets.
 *
 * @param {Array} arr
 * @private
 */

function compileRangeSubnets (arr) {
  var rangeSubnets = new Array(arr.length)

for (var i = 0; i < arr.length; i++) {
    rangeSubnets[i] = parseipNotation(arr[i])
  }

return rangeSubnets
}

/**
 * Compile range subnet array into trust function.
 *
 * @param {Array} rangeSubnets
 * @private
 */

function compileTrust (rangeSubnets) {
  // Return optimized function based on length
  var len = rangeSubnets.length
  return len === 0
    ? trustNone
    : len === 1
      ? trustSingle(rangeSubnets[0])
      : trustMulti(rangeSubnets)
}

/**
 * Parse IP notation string into range subnet.
 *
 * @param {String} note
 * @private
 */

function parseipNotation (note) {
  var pos = note.lastIndexOf('/')
  var str = pos !== -1
    ? note.substring(0, pos)
    : note

if (!isip(str)) {
    throw new TypeError('invalid IP address: ' + str)
  }

var ip = parseip(str)

if (pos === -1 && ip.kind() === 'ipv6' && ip.isIPv4MappedAddress()) {
    // Store as IPv4
    ip = ip.toIPv4Address()
  }

var max = ip.kind() === 'ipv6'
    ? 128
    : 32

var range = pos !== -1
    ? note.substring(pos + 1, note.length)
    : null

if (range === null) {
    range = max
  } else if (DIGIT_REGEXP.test(range)) {
    range = parseInt(range, 10)
  } else if (ip.kind() === 'ipv4' && isip(range)) {
    range = parseNetmask(range)
  } else {
    range = null
  }

if (range <= 0 || range > max) {
    throw new TypeError('invalid range on address: ' + note)
  }

return [ip, range]
}

/**
 * Parse netmask string into CIDR range.
 *
 * @param {String} netmask
 * @private
 */

function parseNetmask (netmask) {
  var ip = parseip(netmask)
  var kind = ip.kind()

return kind === 'ipv4'
    ? ip.prefixLengthFromSubnetMask()
    : null
}

/**
 * Determine address of proxied request.
 *
 * @param {Object} request
 * @param {Function|Array|String} trust
 * @public
 */

function proxyaddr (req, trust) {
  if (!req) {
    throw new TypeError('req argument is required')
  }

if (!trust) {
    throw new TypeError('trust argument is required')
  }

var addrs = alladdrs(req, trust)
  var addr = addrs[addrs.length - 1]

return addr
}

/**
 * Static trust function to trust nothing.
 *
 * @private
 */

function trustNone () {
  return false
}

/**
 * Compile trust function for multiple subnets.
 *
 * @param {Array} subnets
 * @private
 */

function trustMulti (subnets) {
  return function trust (addr) {
    if (!isip(addr)) return false

var ip = parseip(addr)
    var ipconv
    var kind = ip.kind()

for (var i = 0; i < subnets.length; i++) {
      var subnet = subnets[i]
      var subnetip = subnet[0]
      var subnetkind = subnetip.kind()
      var subnetrange = subnet[1]
      var trusted = ip

if (kind !== subnetkind) {
        if (subnetkind === 'ipv4' && !ip.isIPv4MappedAddress()) {
          // Incompatible IP addresses
          continue
        }

if (!ipconv) {
          // Convert IP to match subnet IP kind
          ipconv = subnetkind === 'ipv4'
            ? ip.toIPv4Address()
            : ip.toIPv4MappedAddress()
        }

trusted = ipconv
      }

if (trusted.match(subnetip, subnetrange)) {
        return true
      }
    }

return false
  }
}

/**
 * Compile trust function for single subnet.
 *
 * @param {Object} subnet
 * @private
 */

function trustSingle (subnet) {
  var subnetip = subnet[0]
  var subnetkind = subnetip.kind()
  var subnetisipv4 = subnetkind === 'ipv4'
  var subnetrange = subnet[1]

return function trust (addr) {
    if (!isip(addr)) return false

var ip = parseip(addr)
    var kind = ip.kind()

if (kind !== subnetkind) {
      if (subnetisipv4 && !ip.isIPv4MappedAddress()) {
        // Incompatible IP addresses
        return false
      }

// Convert IP to match subnet IP kind
      ip = subnetisipv4
        ? ip.toIPv4Address()
        : ip.toIPv4MappedAddress()
    }

return ip.match(subnetip, subnetrange)
  }
}

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