1 files changed, 345 insertions, 0 deletions
diff --git a/dgbuilder/dgeflows/node_modules/express/node_modules/proxy-addr/index.js b/dgbuilder/dgeflows/node_modules/express/node_modules/proxy-addr/index.js
new file mode 100644
index 00000000..d7395132
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+++ b/dgbuilder/dgeflows/node_modules/express/node_modules/proxy-addr/index.js
@@ -0,0 +1,345 @@
+/*!
+ * proxy-addr
+ * Copyright(c) 2014 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+/**
+ * Module exports.
+ */
+
+module.exports = proxyaddr;
+module.exports.all = alladdrs;
+module.exports.compile = compile;
+
+/**
+ * Module dependencies.
+ */
+
+var forwarded = require('forwarded');
+var ipaddr = require('ipaddr.js');
+
+/**
+ * Variables.
+ */
+
+var digitre = /^[0-9]+$/;
+var isip = ipaddr.isValid;
+var parseip = ipaddr.parse;
+
+/**
+ * Pre-defined IP ranges.
+ */
+
+var ipranges = {
+  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]
+ * @api 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
+ * @api private
+ */
+
+function compile(val) {
+  if (!val) {
+    throw new TypeError('argument is required');
+  }
+
+  var trust = typeof val === 'string'
+    ? [val]
+    : val;
+
+  if (!Array.isArray(trust)) {
+    throw new TypeError('unsupported trust argument');
+  }
+
+  for (var i = 0; i < trust.length; i++) {
+    val = trust[i];
+
+    if (!ipranges.hasOwnProperty(val)) {
+      continue;
+    }
+
+    // Splice in pre-defined range
+    val = ipranges[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
+ * @api 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
+ * @api 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
+ * @api private
+ */
+
+function parseipNotation(note) {
+  var ip;
+  var kind;
+  var max;
+  var pos = note.lastIndexOf('/');
+  var range;
+
+  ip = pos !== -1
+    ? note.substring(0, pos)
+    : note;
+
+  if (!isip(ip)) {
+    throw new TypeError('invalid IP address: ' + ip);
+  }
+
+  ip = parseip(ip);
+
+  kind = ip.kind();
+  max = kind === 'ipv6'
+    ? 128
+    : 32;
+
+  range = pos !== -1
+    ? note.substring(pos + 1, note.length)
+    : max;
+
+  if (typeof range !== 'number') {
+    range = digitre.test(range)
+      ? parseInt(range, 10)
+      : isip(range)
+      ? parseNetmask(range)
+      : 0;
+  }
+
+  if (ip.kind() === 'ipv6' && ip.isIPv4MappedAddress()) {
+    // Store as IPv4
+    ip = ip.toIPv4Address();
+    range = range <= max
+      ? range - 96
+      : range;
+  }
+
+  if (range <= 0 || range > max) {
+    throw new TypeError('invalid range on address: ' + note);
+  }
+
+  return [ip, range];
+}
+
+/**
+ * Parse netmask string into CIDR range.
+ *
+ * @param {String} note
+ * @api private
+ */
+
+function parseNetmask(netmask) {
+  var ip = parseip(netmask);
+  var parts;
+  var size;
+
+  switch (ip.kind()) {
+    case 'ipv4':
+      parts = ip.octets;
+      size = 8;
+      break;
+    case 'ipv6':
+      parts = ip.parts;
+      size = 16;
+      break;
+  }
+
+  var max = Math.pow(2, size) - 1;
+  var part;
+  var range = 0;
+
+  for (var i = 0; i < parts.length; i++) {
+    part = parts[i] & max;
+
+    if (part === max) {
+      range += size;
+      continue;
+    }
+
+    while (part) {
+      part = (part << 1) & max;
+      range += 1;
+    }
+
+    break;
+  }
+
+  return range;
+}
+
+/**
+ * Determine address of proxied request.
+ *
+ * @param {Object} request
+ * @param {Function|Array|String} trust
+ * @api 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.
+ *
+ * @api private
+ */
+
+function trustNone() {
+  return false;
+}
+
+/**
+ * Compile trust function for multiple subnets.
+ *
+ * @param {Array} subnets
+ * @api private
+ */
+
+function trustMulti(subnets) {
+  return function trust(addr) {
+    if (!isip(addr)) return false;
+
+    var ip = parseip(addr);
+    var ipv4;
+    var kind = ip.kind();
+    var subnet;
+    var subnetip;
+    var subnetkind;
+    var subnetrange;
+    var trusted;
+
+    for (var i = 0; i < subnets.length; i++) {
+      subnet = subnets[i];
+      subnetip = subnet[0];
+      subnetkind = subnetip.kind();
+      subnetrange = subnet[1];
+      trusted = ip;
+
+      if (kind !== subnetkind) {
+        if (kind !== 'ipv6' || subnetkind !== 'ipv4' || !ip.isIPv4MappedAddress()) {
+          continue;
+        }
+
+        // Store addr as IPv4
+        ipv4 = ipv4 || ip.toIPv4Address();
+        trusted = ipv4;
+      }
+
+      if (trusted.match(subnetip, subnetrange)) return true;
+    }
+
+    return false;
+  };
+}
+
+/**
+ * Compile trust function for single subnet.
+ *
+ * @param {Object} subnet
+ * @api 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();
+
+    return kind === subnetkind
+      ? ip.match(subnetip, subnetrange)
+      : subnetisipv4 && kind === 'ipv6' && ip.isIPv4MappedAddress()
+      ? ip.toIPv4Address().match(subnetip, subnetrange)
+      : false;
+  };
+}