ndn-js
Version:
A JavaScript client library for Named Data Networking
401 lines (369 loc) • 21.6 kB
JavaScript
/*
* Copyright (C) 2015-2019 Regents of the University of California.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* A copy of the GNU Lesser General Public License is in the file COPYING.
*/
/*
* This sends a /localhost/nfd/faces/query command to the local NFD to get the
* face ID for a face url, and creates the face if it doesn't exist. Then this sends
* a /localhost/nfd/rib/register command to register a prefix to the face ID.
* This is equivalent to the NFD command line command "nfdc register".
* See http://redmine.named-data.net/projects/nfd/wiki/Management .
*/
var ProtoBuf = require("protobufjs");
var Face = require('../..').Face;
var Name = require('../..').Name;
var Interest = require('../..').Interest;
var Blob = require('../..').Blob;
var UnixTransport = require('../..').UnixTransport;
var ProtobufTlv = require('../..').ProtobufTlv;
var SegmentFetcher = require('../..').SegmentFetcher;
var KeyType = require('../..').KeyType;
var MemoryIdentityStorage = require('../..').MemoryIdentityStorage;
var MemoryPrivateKeyStorage = require('../..').MemoryPrivateKeyStorage;
var IdentityManager = require('../..').IdentityManager;
var SelfVerifyPolicyManager = require('../..').SelfVerifyPolicyManager;
var KeyChain = require('../..').KeyChain;
var DEFAULT_RSA_PUBLIC_KEY_DER = new Buffer([
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]);
var DEFAULT_RSA_PRIVATE_KEY_DER = new Buffer([
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]);
function main()
{
// Silence the warning from Interest wire encode.
Interest.setDefaultCanBePrefix(true);
var prefix = new Name("/nfd/edu/ucla/remap/test");
// Route to aleph.ndn.ucla.edu. Have to use the canonical name with
// an IP address and port.
var uri = "udp4://128.97.98.7:6363";
// Connect to the local forwarder with a Unix socket.
var face = new Face(new UnixTransport());
// For now, when setting face.setCommandSigningInfo, use a key chain with
// a default private key instead of the system default key chain. This
// is OK for now because NFD is configured to skip verification, so it
// ignores the system default key chain.
// On a platform which supports it, it would be better to use the default
// KeyChain constructor.
var identityStorage = new MemoryIdentityStorage();
var privateKeyStorage = new MemoryPrivateKeyStorage();
var keyChain = new KeyChain
(new IdentityManager(identityStorage, privateKeyStorage),
new SelfVerifyPolicyManager(identityStorage));
// Initialize the storage.
var keyName = new Name("/testname/DSK-123");
var certificateName = keyName.getSubName(0, keyName.size() - 1).append
("KEY").append(keyName.get(-1)).append("ID-CERT").append("0");
identityStorage.addKey(keyName, KeyType.RSA, new Blob(DEFAULT_RSA_PUBLIC_KEY_DER, false));
privateKeyStorage.setKeyPairForKeyName
(keyName, KeyType.RSA, DEFAULT_RSA_PUBLIC_KEY_DER, DEFAULT_RSA_PRIVATE_KEY_DER);
face.setCommandSigningInfo(keyChain, certificateName);
// Create the /localhost/nfd/faces/query command interest, including the
// FaceQueryFilter.
var builder = ProtoBuf.loadProtoFile("../browser/face-query-filter.proto");
var descriptor = builder.lookup("ndn_message.FaceQueryFilterMessage");
var FaceQueryFilterMessage = descriptor.build();
var message = new FaceQueryFilterMessage();
var filter = new FaceQueryFilterMessage.FaceQueryFilter();
message.add("face_query_filter", filter);
filter.uri = uri;
var encodedFilter = ProtobufTlv.encode(message, descriptor);
var interest = new Interest(new Name("/localhost/nfd/faces/query"));
interest.getName().append(encodedFilter);
SegmentFetcher.fetch
(face, interest, null,
function(content) {
processFaceStatus(content, prefix, uri, face);
},
function(errorCode, localMessage) {
console.log(localMessage);
// This will cause the script to quit.
face.close();
});
}
/**
* This is called when all the segments are received to decode the
* encodedFaceStatus as a TLV FaceStatus message. If the face ID exists for
* the face URL, use it to call registerRoute(), otherwise send a
* /localhost/nfd/faces/create command to create the face.
* @param {Blob} encodedFaceStatus The TLV-encoded FaceStatus.
* @param {Name} prefix The prefix name to register.
* @param {String} uri The remote URI in case we need to tell NFD to create a face.
* @param {Face} face The Face which is used to sign the command interest and call
* expressInterest.
*/
function processFaceStatus(encodedFaceStatus, prefix, uri, face)
{
if (encodedFaceStatus.size() == 0) {
// No result, so we need to tell NFD to create the face.
// Encode the ControlParameters.
var builder = ProtoBuf.loadProtoFile("../browser/control-parameters.proto");
var ControlParametersTypes =
builder.lookup("ndn_message.ControlParametersTypes").build();
var descriptor = builder.lookup
("ndn_message.ControlParametersTypes.ControlParametersMessage");
var ControlParametersMessage = descriptor.build();
var message = new ControlParametersMessage();
message.control_parameters =
new ControlParametersTypes.ControlParameters();
message.control_parameters.uri = uri;
var encodedControlParameters = ProtobufTlv.encode(message, descriptor);
var interest = new Interest(new Name("/localhost/nfd/faces/create"));
interest.getName().append(encodedControlParameters);
interest.setInterestLifetimeMilliseconds(10000);
// Sign and express the interest.
face.makeCommandInterest(interest);
face.expressInterest
(interest,
function(localInterest, data) {
processCreateFaceResponse(data.getContent(), prefix, face);
},
function(localInterest) {
// This will cause the script to quit.
face.close();
console.log("Face create command timed out.");
});
}
else {
var builder = ProtoBuf.loadProtoFile("../browser/face-status.proto");
var descriptor = builder.lookup("ndn_message.FaceStatusMessage");
var FaceStatusMessage = descriptor.build();
var decodedFaceStatus = new FaceStatusMessage();
ProtobufTlv.decode(decodedFaceStatus, descriptor, encodedFaceStatus);
var faceId = decodedFaceStatus.face_status[0].face_id;
console.log("Found face ID " + faceId);
registerRoute(prefix, faceId, face);
}
}
/**
* This is called when the face create command responds to decode the
* encodedControlResonse as a TLV ControlResponse message containing one
* ControlParameters. Get the face ID and call registerRoute().
* @param {Blob} encodedControlResponse The TLV-encoded ControlResponse.
* @param {Name} prefix The prefix name to register.
* @param {Face} face The Face which is used to sign the command interest and
* call expressInterest.
*/
function processCreateFaceResponse(encodedControlResponse, prefix, face)
{
var builder = ProtoBuf.loadProtoFile("../browser/control-parameters.proto");
var descriptor = builder.lookup
("ndn_message.ControlParametersTypes.ControlParametersResponseMessage");
var ControlParametersResponseMessage = descriptor.build();
var decodedControlResponse = new ControlParametersResponseMessage();
ProtobufTlv.decode(decodedControlResponse, descriptor, encodedControlResponse);
var controlResponse = decodedControlResponse.control_response;
var lowestErrorCode = 400;
if (controlResponse.status_code >= lowestErrorCode) {
console.log
("Face create command got error, code " + controlResponse.status_code +
": " + controlResponse.status_text);
// This will cause the script to quit.
face.close();
return;
}
if (controlResponse.control_parameters.length != 1) {
console.log
("Face create command response does not have one ControlParameters");
// This will cause the script to quit.
face.close();
return;
}
var faceId = controlResponse.control_parameters[0].face_id;
console.log("Created face ID " + faceId);
registerRoute(prefix, faceId, face);
}
/**
* Use /localhost/nfd/rib/register to register the prefix to the faceId.
* @param {Name} prefix The prefix name to register.
* @param {number} faceId The face ID.
* @param {Face} face The Face which is used to sign the command interest and
* call expressInterest.
*/
function registerRoute(prefix, faceId, face)
{
// Use default values;
var origin = 255;
var cost = 0;
var CHILD_INHERIT = 1;
var flags = CHILD_INHERIT;
var builder = ProtoBuf.loadProtoFile("../browser/control-parameters.proto");
var ControlParametersTypes =
builder.lookup("ndn_message.ControlParametersTypes").build();
var descriptor = builder.lookup
("ndn_message.ControlParametersTypes.ControlParametersMessage");
var ControlParametersMessage = descriptor.build();
var message = new ControlParametersMessage();
message.control_parameters =
new ControlParametersTypes.ControlParameters();
message.control_parameters.name = new ControlParametersTypes.Name();
for (var i = 0; i < prefix.size(); ++i)
message.control_parameters.name.add
("component", prefix.get(i).getValue().buf());
message.control_parameters.face_id = faceId;
message.control_parameters.origin = origin;
message.control_parameters.cost = cost;
message.control_parameters.flags = flags;
var encodedControlParameters = ProtobufTlv.encode(message, descriptor);
var interest = new Interest(new Name("/localhost/nfd/rib/register"));
interest.getName().append(encodedControlParameters);
interest.setInterestLifetimeMilliseconds(10000);
// Sign and express the interest.
face.makeCommandInterest(interest);
face.expressInterest
(interest,
function(localInterest, data) {
// This will cause the script to quit.
face.close();
processRegisterResponse(data.getContent());
},
function(localInterest) {
// This will cause the script to quit.
face.close();
console.log("Register route command timed out.");
});
}
/**
* This is called when the register route command responds to decode the
* encodedControlResponse as a TLV ControlParametersResponse message containing
* one ControlParameters. On success, print the ControlParameters values which
* should be the same as requested.
* @param {Blob} encodedControlResponse The TLV-encoded ControlParametersResponse.
*/
function processRegisterResponse(encodedControlResponse)
{
var builder = ProtoBuf.loadProtoFile("../browser/control-parameters.proto");
var descriptor = builder.lookup
("ndn_message.ControlParametersTypes.ControlParametersResponseMessage");
var ControlParametersResponseMessage = descriptor.build();
var decodedControlResponse = new ControlParametersResponseMessage();
ProtobufTlv.decode(decodedControlResponse, descriptor, encodedControlResponse);
var controlResponse = decodedControlResponse.control_response;
var lowestErrorCode = 400;
if (controlResponse.status_code >= lowestErrorCode) {
console.log
("Face create command got error, code " + controlResponse.status_code +
": " + controlResponse.status_text);
return;
}
if (controlResponse.control_parameters.length != 1) {
console.log
("Face create command response does not have one ControlParameters");
return;
}
// Success. Print the ControlParameters response.
var controlParameters = controlResponse.control_parameters[0];
console.log
("Successful in name registration: ControlParameters(Name: " +
ProtobufTlv.toName(controlParameters.name.component).toUri() +
", FaceId: " + controlParameters.face_id +
", Origin: " + controlParameters.origin +
", Cost: " + controlParameters.cost +
", Flags: " + controlParameters.flags + ")");
}
main();