ndn-js-contrib/dist/FIB.js

Reusable 'Classes' for Named Data Networking: NameTree, PIT, FIB, ContentStore, Interfaces, and Transports

var NameTree = require("./NameTree.js");
function FIB() {
  this._nameTree = new NameTree();
}
FIB.prototype.insert = function FIB_insert(prefix, face) {
  var self = this;
  return new Promise(function FIB_insert_Promise(resolve, reject) {
    var node = self._nameTree.get(prefix);
    if (!node.getItem())
      node.setItem(new FIB.Entry());
    var fibEntry = node.getItem();
    if (fibEntry.addNextHop(face))
      resolve(face);
    else
      reject(new Error("FIB.insert(prefix, face): duplicate prefix and face combination"));
  });
};
FIB.prototype.remove = function FIB_remove(face) {
  var prefixes = face.registeredPrefixTable;
  for (var i in prefixes)
    this._nameTree.get(prefixes[i]).getItem().removeFace(face);
};
FIB.prototype.lookup = function FIB_lookup(interest, face) {
  var self = this;
  return new Promise(function FIB_lookup_Promise(resolve, reject) {
    self._nameTree.up(interest.name);
    self._nameTree.skip(function(node) {
      var fibEntry = node.getItem();
      return (!fibEntry || (fibEntry.getNextHops().length === 0) || ((fibEntry.getNextHops().length === 1) && (fibEntry.getNextHops()[0].face === face)));
    });
    var results = [];
    var $__3 = true;
    var $__4 = false;
    var $__5 = undefined;
    try {
      for (var $__1 = void 0,
          $__0 = (self._nameTree)[$traceurRuntime.toProperty(Symbol.iterator)](); !($__3 = ($__1 = $__0.next()).done); $__3 = true) {
        var node = $__1.value;
        {
          var nexthops = node.getItem().getNextHops();
          for (var i in nexthops) {
            var dup = false;
            for (var j in results)
              if (nexthops[i].face === results[j].face) {
                dup = true;
                break;
              }
            if (!dup && (nexthops[i].face !== face))
              results.push(nexthops[i]);
          }
        }
      }
    } catch ($__6) {
      $__4 = true;
      $__5 = $__6;
    } finally {
      try {
        if (!$__3 && $__0.return != null) {
          $__0.return();
        }
      } finally {
        if ($__4) {
          throw $__5;
        }
      }
    }
    if (results.length)
      resolve(results);
    else
      reject(new Error("FIB.lookup(interest, face): no valid nexthops for that interest"));
  });
};
FIB.Entry = function FIB_Entry() {
  this._nextHops = [];
};
FIB.Entry.prototype.getNextHops = function FIB_Entry_getNextHops() {
  return this._nextHops;
};
FIB.Entry.prototype.addNextHop = function FIB_Entry_addNextHop(face) {
  for (var i in this._nextHops)
    if (this._nextHops[i].face === face)
      return false;
  this._nextHops.push({
    face: face,
    measurements: {
      Fulfilled: 0,
      timeouts: 0
    }
  });
  return true;
};
FIB.Entry.prototype.removeFace = function FIB_Entry_removeFace(face) {
  for (var i in this._nextHops)
    if (this._nextHops[i].face === face) {
      this._nextHops.splice(i, 1);
      break;
    }
};
module.exports = FIB;