From 0a3b4575833cd7adb9b3f8436c2a8b63e43e9d4a Mon Sep 17 00:00:00 2001
From: AJ ONeal <coolaj86@gmail.com>
Date: Wed, 30 Dec 2015 02:47:38 +0000
Subject: [PATCH] get all external ips

---
 index.js           |  16 +++--
 lib/external-ip.js | 144 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 151 insertions(+), 9 deletions(-)
 create mode 100644 lib/external-ip.js

diff --git a/index.js b/index.js
index c781371..c5fc2c5 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,6 @@
 'use strict';
 
 var PromiseA = require('bluebird');
-var requestAsync = PromiseA.promisify(require('request'));
 
 module.exports.create = function (args) {
   var promises = [];
@@ -14,17 +13,16 @@ module.exports.create = function (args) {
   // TODO determine if we have a AAAA local ip or not
   // TODO get A and AAAA records
   if (-1 !== args.protocols.indexOf('none')) {
-    promises.push(PromiseA.some(args.ipifyUrls.map(function (ipifyUrl) {
-      return requestAsync('https://' + ipifyUrl).then(function (resp) {
-        var ip = (resp.body || '').toString('ascii');
-
-        if (!/\d+\.\d+\.\d+\.\d+/.test(ip) && !/\w+\:\w+/.test(ip)) {
-          return PromiseA.reject(new Error("bad response '" + resp.body + "'"));
-        }
+    promises.push(PromiseA.any(args.ipifyUrls.map(function (ipifyUrl) {
+      var getIp = require('./lib/external-ip');
 
+      return getIp({ hostname: ipifyUrl, debug: args.debug });
+    })).then(function (ips) {
+      return ips.map(function (ip) {
+        // TODO attempt loopback
         return ip;
       });
-    }), 1));
+    }));
   }
 
   return PromiseA.all(promises).then(function (results) {
diff --git a/lib/external-ip.js b/lib/external-ip.js
new file mode 100644
index 0000000..a1346dd
--- /dev/null
+++ b/lib/external-ip.js
@@ -0,0 +1,144 @@
+'use strict';
+
+var PromiseA = require('bluebird');
+//var dns = PromiseA.promisifyAll(require('dns'));
+var https = PromiseA.promisifyAll(require('https'));
+var os = require('os');
+
+function requestAsync(opts) {
+  return new PromiseA(function (resolve, reject) {
+    var req = https.request(opts, function (res) {
+      var data = '';
+
+      res.on('error', function (err) {
+        if (opts.debug) {
+          console.error('[Error] HP: bad request:');
+          console.error(err);
+        }
+        reject(err);
+      });
+      res.on('data', function (chunk) {
+        if (opts.debug > 2) {
+          console.log('HP: request chunk:');
+          console.log(chunk);
+        }
+        data += chunk.toString('utf8');
+      });
+      res.on('end', function () {
+        if (opts.debug > 2) {
+          console.log('HP: request complete:');
+          console.log(data);
+        }
+        resolve(data);
+      });
+    });
+
+    req.on('error', reject);
+    req.end();
+  });
+}
+
+module.exports = function (opts) {
+  var promises = [];
+  var interfaces = os.networkInterfaces();
+  var ifacenames = Object.keys(interfaces).filter(function (ifacename) {
+    // http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
+    // https://wiki.archlinux.org/index.php/Network_configuration#Device_names
+    // we do not include tun and bridge devices because we're trying
+    // to see if any physical interface is internet-connected first
+    return /^(en|sl|wl|ww|eth|net|lan|wifi|inet)/.test(ifacename);
+  });
+  var ifaces = ifacenames.reduce(function (all, ifacename) {
+    var ifs = interfaces[ifacename];
+
+    ifs.forEach(function (iface) {
+      if (!iface.internal && !/^fe80/.test(iface.address)) {
+        all.push(iface);
+      }
+    });
+
+    return all;
+  }, []);
+
+  /*
+  // TODO how to support servername
+  promises.push(dns.resolve4Async(hostname).then(function (ips) {
+    return ips.map(function (ip) {
+      return {
+        address: ip
+      , family: 'IPv4'
+      };
+    });
+  }));
+
+  promises.push(dns.resolve6Async(hostname).then(function (ips) {
+    return ips.map(function (ip) {
+      return {
+        address: ip
+      , family: 'IPv6'
+      };
+    });
+  }));
+  */
+
+  function parseIp(ip) {
+    if (!/\d+\.\d+\.\d+\.\d+/.test(ip) && !/\w+\:\w+/.test(ip)) {
+      return PromiseA.reject(new Error("bad response '" + ip + "'"));
+    }
+
+    return ip;
+  }
+
+  function ignoreEinval(err) {
+    if ('EINVAL' === err.code) {
+      if (opts.debug) {
+        console.warn('[HP] tried to bind to invalid address:');
+        console.warn(err.stack);
+      }
+      return null;
+    }
+
+    return PromiseA.reject(err);
+  }
+
+  if (opts.debug) {
+    console.log('[HP] external ip opts:');
+    console.log(opts);
+
+    console.log('[HP] external ifaces:');
+    console.log(ifaces);
+  }
+
+  ifaces.forEach(function (iface) {
+    promises.push(requestAsync({
+      family: iface.family
+    , method: 'GET'
+    , headers: {
+        Host: opts.hostname
+      }
+    , localAddress: iface.address
+    , servername: opts.hostname   // is this actually sent to tls.connect()?
+    , hostname: opts.hostname     // if so we could do the DNS ourselves
+                                  // and use the ip address here
+    , port: opts.port || 443
+    , pathname: opts.pathname || opts.path || '/'
+    }).then(parseIp, ignoreEinval).then(function (addr) {
+      return {
+        family: iface.family
+      , address: addr
+      };
+    }));
+  });
+
+  return PromiseA.all(promises).then(function (results) {
+    if (opts.debug) {
+      console.log('[HP] got all ip address types');
+      console.log(results);
+    }
+
+    return results;
+  }, function (err) {
+    console.error('[HP] error');
+    console.error(err);
+  });
+};