lots and lots of failover

lib/index.js

@@ -10,44 +10,131 @@ module.exports.create = function (args) {
   }
 
   var servers = loopback.create(args);
-  var promises = [];
+  //var promises = [];
 
   if (args.debug) {
     console.log('[HP] create servers');
     console.log(servers);
   }
 
-  if (-1 !== args.protocols.indexOf('none')) {
-    promises.push(PromiseA.any(args.ipifyUrls.map(function (ipifyUrl) {
+  function getExternalIps() {
+    return PromiseA.any(args.ipifyUrls.map(function (ipifyUrl) {
       var getIp = require('./external-ip');
 
       return getIp({ hostname: ipifyUrl, debug: args.debug });
-    })).then(function (ips) {
-      // TODO how (if at all) should ip.address === ip.localAddress be treated differently?
-      // TODO check local firewall?
-      // TODO would it ever make sense for a public ip to respond to upnp?
+    }));
+  }
+
+  function testOpenPort(ip, portInfo) {
     var requestAsync = require('./request');
 
-      return PromiseA.all(ips.map(function (ip) {
     return requestAsync({
-          secure: false
+      secure: portInfo.secure
+    , rejectUnauthorized: false
     , hostname: ip.address
-        , path: '/api/com.daplie.loopback'
-        , servername: 'daplie.invalid'
+      // '/.well-known/com.daplie.loopback/'
+    , path: args.loopbackPrefix + args.key
+      // 'loopback.daplie.invalid'
+    , servername: args.loopbackHostname
     , localAddress: ip.localAddress
-        , port: 65080
+    , port: portInfo.external || portInfo.internal
     , headers: {
-            Host: 'daplie.invalid'
+        // 'loopback.daplie.invalid'
+        Host: args.loopbackHostname
       }
+    }).then(function (val) {
+      if (val !== args.value) {
+        return PromiseA.reject(new Error("invalid loopback token value"));
+      }
+
+      ip.validated = true;
+
+      ip.ports.push(portInfo);
+      portInfo.ips.push(ip);
+
+      return portInfo;
     });
-      }));
+  }
+
+  function testPort(opts) {
+    // TODO should ip.address === ip.localAddress be treated differently?
+    // TODO check local firewall?
+    // TODO would it ever make sense for a public ip to respond to upnp?
+
+    // TODO should we pass any or require all?
+    opts.portInfo.ips = [];
+
+    return PromiseA.any(opts.ips.map(function (ip) {
+      ip.ports = [];
+
+      if (!opts.pretest) {
+        //console.log('[HP pretest]', opts.pretest);
+        return ip;
+      }
+
+      return testOpenPort(ip, opts.portInfo);
     }));
   }
 
-  return PromiseA.all(promises).then(function (results) {
+  return getExternalIps().then(function (ips) {
+    var pretest = (-1 !== args.protocols.indexOf('none'));
+    var portInfos = args.plainPorts.concat(args.tlsPorts.map(function (info) {
+      info.secure = true;
+      return info;
+    }));
+
+    return PromiseA.all(portInfos.map(function (info) {
+      // TODO clone-merge args
+      return testPort({
+        portInfo: info
+      , ips: ips
+      , pretest: pretest
+      });
+    })).then(function (portInfos) {
       if (args.debug) {
-      console.log('[HP] all done');
-      console.log(results);
+        console.log('[HP] all done on the first try');
+        console.log(portInfos);
       }
+      return portInfos;
+    }, function () {
+      // at least one port could not be mapped
+      var mappers = [];
+
+      if (-1 !== args.protocols.indexOf('upnp')
+        ||  -1 !== args.protocols.indexOf('ssdp')
+      ) {
+        mappers.push(require('./upnp'));
+      }
+
+      if (-1 !== args.protocols.indexOf('pmp')
+        || -1 !== args.protocols.indexOf('nat-pmp')
+      ) {
+        mappers.push(require('./pmp'));
+      }
+
+      return PromiseA.all(portInfos.map(function (portInfo) {
+        return PromiseA.any(mappers.map(function (fn) {
+          var p = fn(args, ips, portInfo);
+
+          if (portInfos.ips.length) {
+            return portInfos;
+          }
+
+          return p;
+        }));
+      })).then(function () {
+        if (args.debug) {
+          console.log("[HP] all ports successfully mapped");
+          console.log(portInfos);
+        }
+
+        return portInfos;
+      });
+    }).then(function () {
+      return portInfos;
+    }, function () {
+      console.warn('[HP] RVPN not implemented');
+      return portInfos;
+    });
   });
 };

lib/loopback-listener.js

@@ -56,5 +56,8 @@ module.exports.create = function (opts) {
     });
   });
 
+  results.key = opts.key;
+  results.value = opts.value;
+
   return results;
 };

lib/middleware.js

@@ -6,14 +6,20 @@ function middleware(opts) {
   var key = opts.key;
   var val = opts.value;
   var vhost = opts.vhost;
-  var pathnamePrefix = opts.prefix || '/.well-known/com.daplie.loopback/';
-  var defaultHostname = 'loopback.daplie.invalid';
+  var pathnamePrefix = opts.loopbackPrefix;
+  var defaultHostname = opts.loopbackHostname;
 
+  if (!defaultHostname) {
+    defaultHostname = opts.loopbackHostname = 'loopback.daplie.invalid';
+  }
+  if (!pathnamePrefix) {
+    pathnamePrefix = opts.loopbackPrefix = '/.well-known/com.daplie.loopback/';
+  }
   if (!key) {
-    opts.key = require('crypto').randomBytes(8).toString('hex');
+    key = opts.key = require('crypto').randomBytes(8).toString('hex');
   }
   if (!val) {
-    opts.value = require('crypto').randomBytes(16).toString('hex');
+    val = opts.value = require('crypto').randomBytes(16).toString('hex');
   }
   if (!vhost && vhost !== false) {
     vhost = defaultHostname;