522 lines
16 KiB
TypeScript
522 lines
16 KiB
TypeScript
import _ from "lodash";
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import async from "async";
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import crypto from "crypto";
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import oldFs, {promises as fs} from "graceful-fs";
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import glob from "glob";
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import {config} from "../config";
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import ErrorTypes from "../utils/errorTypes";
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import Logger from "../logger";
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import * as MailService from "../services/mailService";
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import {normalizeString} from "../utils/strings";
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import {monitoringConfirmUrl, monitoringDisableUrl} from "../utils/urlBuilder";
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import {MonitoringState, MonitoringToken, Node, NodeSecrets, NodeStatistics, Token} from "../types";
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import util from "util";
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const pglob = util.promisify(glob);
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type NodeFilter = {
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hostname?: string,
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mac?: string,
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key?: string,
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token?: Token,
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monitoringToken?: string,
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}
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type NodeFilenameParsed = {
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hostname?: string,
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mac?: string,
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key?: string,
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token?: Token,
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monitoringToken?: string,
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}
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const linePrefixes = {
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hostname: '# Knotenname: ',
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nickname: '# Ansprechpartner: ',
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email: '# Kontakt: ',
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coords: '# Koordinaten: ',
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mac: '# MAC: ',
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token: '# Token: ',
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monitoring: '# Monitoring: ',
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monitoringToken: '# Monitoring-Token: '
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};
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const filenameParts = ['hostname', 'mac', 'key', 'token', 'monitoringToken'];
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function generateToken(): Token {
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return crypto.randomBytes(8).toString('hex');
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}
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function toNodeFilesPattern(filter: NodeFilter): string {
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const pattern = _.join(
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_.map(
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filenameParts,
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field => field in filter ? (filter as {[key: string]: string | undefined})[field] : '*'),
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'@'
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);
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return config.server.peersPath + '/' + pattern.toLowerCase();
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}
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function findNodeFiles(filter: NodeFilter): Promise<string[]> {
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return pglob(toNodeFilesPattern(filter));
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}
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function findNodeFilesSync(filter: NodeFilter) {
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return glob.sync(toNodeFilesPattern(filter));
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}
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async function findFilesInPeersPath(): Promise<string[]> {
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const files = await pglob(config.server.peersPath + '/*');
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return await async.filter(files, (file, fileCallback) => {
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if (file[0] === '.') {
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return fileCallback(null, false);
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}
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fs.lstat(file)
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.then(stats => fileCallback(null, stats.isFile()))
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.catch(fileCallback);
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});
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}
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function parseNodeFilename(filename: string): NodeFilenameParsed {
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const parts = _.split(filename, '@', filenameParts.length);
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const parsed: {[key: string]: string | undefined} = {};
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const zippedParts = _.zip<string, string>(filenameParts, parts);
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_.each(zippedParts, part => {
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const key = part[0];
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if (key) {
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parsed[key] = part[1];
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}
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});
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return parsed;
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}
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function isDuplicate(filter: NodeFilter, token: Token | null): boolean {
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const files = findNodeFilesSync(filter);
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if (files.length === 0) {
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return false;
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}
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if (files.length > 1 || !token /* node is being created*/) {
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return true;
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}
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return parseNodeFilename(files[0]).token !== token;
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}
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function checkNoDuplicates(token: Token | null, node: Node, nodeSecrets: NodeSecrets): void {
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if (isDuplicate({ hostname: node.hostname }, token)) {
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throw {data: {msg: 'Already exists.', field: 'hostname'}, type: ErrorTypes.conflict};
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}
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if (node.key) {
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if (isDuplicate({ key: node.key }, token)) {
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throw {data: {msg: 'Already exists.', field: 'key'}, type: ErrorTypes.conflict};
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}
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}
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if (isDuplicate({ mac: node.mac }, token)) {
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throw {data: {msg: 'Already exists.', field: 'mac'}, type: ErrorTypes.conflict};
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}
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if (nodeSecrets.monitoringToken && isDuplicate({ monitoringToken: nodeSecrets.monitoringToken }, token)) {
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throw {data: {msg: 'Already exists.', field: 'monitoringToken'}, type: ErrorTypes.conflict};
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}
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}
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function toNodeFilename(token: Token, node: Node, nodeSecrets: NodeSecrets): string {
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return config.server.peersPath + '/' +
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(
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(node.hostname || '') + '@' +
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(node.mac || '') + '@' +
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(node.key || '') + '@' +
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(token || '') + '@' +
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(nodeSecrets.monitoringToken || '')
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).toLowerCase();
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}
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async function writeNodeFile(
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isUpdate: boolean,
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token: Token,
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node: Node,
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nodeSecrets: NodeSecrets,
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): Promise<{token: Token, node: Node}> {
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const filename = toNodeFilename(token, node, nodeSecrets);
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let data = '';
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_.each(linePrefixes, function (prefix, key) {
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let value;
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switch (key) {
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case 'monitoring':
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if (node.monitoring && node.monitoringConfirmed) {
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value = 'aktiv';
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} else if (node.monitoring && !node.monitoringConfirmed) {
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value = 'pending';
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} else {
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value = '';
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}
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break;
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case 'monitoringToken':
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value = nodeSecrets.monitoringToken || '';
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break;
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default:
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value = key === 'token' ? token : (node as {[key: string]: any})[key];
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if (_.isUndefined(value)) {
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const nodeSecret = (nodeSecrets as {[key: string]: string})[key];
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value = _.isUndefined(nodeSecret) ? '' : nodeSecret;
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}
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break;
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}
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data += prefix + value + '\n';
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});
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if (node.key) {
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data += 'key "' + node.key + '";\n';
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}
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// since node.js is single threaded we don't need a lock
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if (isUpdate) {
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const files = findNodeFilesSync({ token: token });
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if (files.length !== 1) {
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throw {data: 'Node not found.', type: ErrorTypes.notFound};
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}
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checkNoDuplicates(token, node, nodeSecrets);
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const file = files[0];
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try {
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oldFs.unlinkSync(file);
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}
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catch (error) {
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Logger.tag('node', 'save').error('Could not delete old node file: ' + file, error);
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throw {data: 'Could not remove old node data.', type: ErrorTypes.internalError};
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}
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} else {
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checkNoDuplicates(null, node, nodeSecrets);
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}
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try {
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oldFs.writeFileSync(filename, data, 'utf8');
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return {token, node};
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}
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catch (error) {
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Logger.tag('node', 'save').error('Could not write node file: ' + filename, error);
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throw {data: 'Could not write node data.', type: ErrorTypes.internalError};
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}
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}
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async function deleteNodeFile(token: Token): Promise<void> {
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let files;
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try {
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files = await findNodeFiles({ token: token });
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}
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catch (error) {
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Logger.tag('node', 'delete').error('Could not find node file: ' + files, error);
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throw {data: 'Could not delete node.', type: ErrorTypes.internalError};
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}
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if (files.length !== 1) {
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throw {data: 'Node not found.', type: ErrorTypes.notFound};
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}
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try {
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oldFs.unlinkSync(files[0]);
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}
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catch (error) {
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Logger.tag('node', 'delete').error('Could not delete node file: ' + files, error);
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throw {data: 'Could not delete node.', type: ErrorTypes.internalError};
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}
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}
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async function parseNodeFile(file: string): Promise<{node: Node, nodeSecrets: NodeSecrets}> {
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const contents = await fs.readFile(file);
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const lines = contents.toString();
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const node: {[key: string]: any} = {};
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const nodeSecrets: {[key: string]: any} = {};
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_.each(lines.split('\n'), function (line) {
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const entries: {[key: string]: string} = {};
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for (const key of Object.keys(linePrefixes)) {
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const prefix = (linePrefixes as {[key: string]: string})[key];
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if (line.substring(0, prefix.length) === prefix) {
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entries[key] = normalizeString(line.substr(prefix.length));
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break;
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}
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}
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if (_.isEmpty(entries) && line.substring(0, 5) === 'key "') {
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entries.key = normalizeString(line.split('"')[1]);
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}
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_.each(entries, function (value, key) {
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switch (key) {
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case 'mac':
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node.mac = value;
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node.mapId = _.toLower(value).replace(/:/g, '');
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break;
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case 'monitoring':
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const active = value === 'aktiv';
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const pending = value === 'pending';
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node.monitoring = active || pending;
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node.monitoringConfirmed = active;
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node.monitoringState =
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active ? MonitoringState.ACTIVE : (pending ? MonitoringState.PENDING : MonitoringState.DISABLED);
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break;
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case 'monitoringToken':
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nodeSecrets.monitoringToken = value;
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break;
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default:
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node[key] = value;
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break;
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}
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});
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});
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return {
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node: node as Node,
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nodeSecrets: nodeSecrets as NodeSecrets,
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};
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}
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async function findNodeDataByFilePattern(filter: NodeFilter): Promise<{node: Node, nodeSecrets: NodeSecrets} | null> {
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const files = await findNodeFiles(filter);
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if (files.length !== 1) {
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return null;
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}
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const file = files[0];
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return await parseNodeFile(file);
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}
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async function getNodeDataByFilePattern(filter: NodeFilter): Promise<{node: Node, nodeSecrets: NodeSecrets}> {
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const result = await findNodeDataByFilePattern(filter);
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if (!result) {
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throw {data: 'Node not found.', type: ErrorTypes.notFound};
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}
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return result;
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}
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async function sendMonitoringConfirmationMail(node: Node, nodeSecrets: NodeSecrets): Promise<void> {
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const monitoringToken = nodeSecrets.monitoringToken;
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if (!monitoringToken) {
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Logger
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.tag('monitoring', 'confirmation')
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.error('Could not enqueue confirmation mail. No monitoring token found.');
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throw {data: 'Internal error.', type: ErrorTypes.internalError};
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}
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const confirmUrl = monitoringConfirmUrl(monitoringToken);
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const disableUrl = monitoringDisableUrl(monitoringToken);
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await MailService.enqueue(
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config.server.email.from,
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node.nickname + ' <' + node.email + '>',
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'monitoring-confirmation',
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{
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node: node,
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confirmUrl: confirmUrl,
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disableUrl: disableUrl
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},
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);
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}
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export async function createNode (node: Node): Promise<{token: Token, node: Node}> {
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const token = generateToken();
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const nodeSecrets: NodeSecrets = {};
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node.monitoringConfirmed = false;
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if (node.monitoring) {
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nodeSecrets.monitoringToken = generateToken();
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}
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const written = await writeNodeFile(false, token, node, nodeSecrets);
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if (written.node.monitoring && !written.node.monitoringConfirmed) {
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await sendMonitoringConfirmationMail(written.node, nodeSecrets)
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}
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return written;
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}
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export async function updateNode (token: Token, node: Node): Promise<{token: Token, node: Node}> {
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const {node: currentNode, nodeSecrets} = await getNodeDataWithSecretsByToken(token);
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let monitoringConfirmed = false;
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let monitoringToken = '';
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if (node.monitoring) {
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if (!currentNode.monitoring) {
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// monitoring just has been enabled
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monitoringConfirmed = false;
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monitoringToken = generateToken();
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} else {
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// monitoring is still enabled
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if (currentNode.email !== node.email) {
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// new email so we need a new token and a reconfirmation
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monitoringConfirmed = false;
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monitoringToken = generateToken();
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} else {
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// email unchanged, keep token (fix if not set) and confirmation state
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monitoringConfirmed = currentNode.monitoringConfirmed;
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monitoringToken = nodeSecrets.monitoringToken || generateToken();
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}
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}
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}
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node.monitoringConfirmed = monitoringConfirmed;
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nodeSecrets.monitoringToken = monitoringToken;
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const written = await writeNodeFile(true, token, node, nodeSecrets);
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if (written.node.monitoring && !written.node.monitoringConfirmed) {
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await sendMonitoringConfirmationMail(written.node, nodeSecrets)
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}
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return written;
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}
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export async function internalUpdateNode(
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token: Token,
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node: Node, nodeSecrets: NodeSecrets
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): Promise<{token: Token, node: Node}> {
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return await writeNodeFile(true, token, node, nodeSecrets);
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}
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export async function deleteNode (token: Token): Promise<void> {
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await deleteNodeFile(token);
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}
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export async function getAllNodes(): Promise<Node[]> {
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let files;
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try {
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files = await findNodeFiles({});
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} catch (error) {
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Logger.tag('nodes').error('Error getting all nodes:', error);
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throw {data: 'Internal error.', type: ErrorTypes.internalError};
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}
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const nodes: Node[] = [];
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for (const file of files) {
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try {
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const {node} = await parseNodeFile(file);
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nodes.push(node);
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} catch (error) {
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Logger.tag('nodes').error('Error getting all nodes:', error);
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throw {data: 'Internal error.', type: ErrorTypes.internalError};
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}
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}
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return nodes;
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}
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export async function getNodeDataWithSecretsByMac (mac: string): Promise<{node: Node, nodeSecrets: NodeSecrets} | null> {
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return await findNodeDataByFilePattern({ mac: mac });
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}
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export async function getNodeDataByMac (mac: string): Promise<Node | null> {
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const result = await findNodeDataByFilePattern({ mac: mac });
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return result ? result.node : null;
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}
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export async function getNodeDataWithSecretsByToken (token: Token): Promise<{node: Node, nodeSecrets: NodeSecrets}> {
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return await getNodeDataByFilePattern({ token: token });
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}
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export async function getNodeDataByToken (token: Token): Promise<Node> {
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const {node} = await getNodeDataByFilePattern({ token: token });
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return node;
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}
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export async function getNodeDataWithSecretsByMonitoringToken (
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monitoringToken: MonitoringToken
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): Promise<{node: Node, nodeSecrets: NodeSecrets}> {
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return await getNodeDataByFilePattern({ monitoringToken: monitoringToken });
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}
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export async function getNodeDataByMonitoringToken (
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monitoringToken: MonitoringToken
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): Promise<Node> {
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const {node} = await getNodeDataByFilePattern({ monitoringToken: monitoringToken });
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return node;
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}
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export async function fixNodeFilenames(): Promise<void> {
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const files = await findFilesInPeersPath();
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for (const file of files) {
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const {node, nodeSecrets} = await parseNodeFile(file);
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const expectedFilename = toNodeFilename(node.token, node, nodeSecrets);
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if (file !== expectedFilename) {
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try {
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await fs.rename(file, expectedFilename);
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}
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catch (error) {
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throw new Error(
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'Cannot rename file ' + file + ' to ' + expectedFilename + ' => ' + error
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);
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}
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}
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}
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}
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export async function getNodeStatistics(): Promise<NodeStatistics> {
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const nodes = await getAllNodes();
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const nodeStatistics: NodeStatistics = {
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registered: _.size(nodes),
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withVPN: 0,
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withCoords: 0,
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monitoring: {
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active: 0,
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pending: 0
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}
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};
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_.each(nodes, function (node: Node): void {
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if (node.key) {
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nodeStatistics.withVPN += 1;
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}
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if (node.coords) {
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nodeStatistics.withCoords += 1;
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}
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function ensureExhaustive(monitoringState: never): void {
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throw new Error('Add missing case for monitoring stat below: ' + monitoringState);
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}
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const monitoringState = node.monitoringState;
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switch (monitoringState) {
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case MonitoringState.ACTIVE:
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nodeStatistics.monitoring.active += 1;
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break;
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case MonitoringState.PENDING:
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nodeStatistics.monitoring.pending += 1;
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break;
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case MonitoringState.DISABLED:
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// Not counted seperately.
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break;
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default:
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ensureExhaustive(monitoringState);
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}
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});
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return nodeStatistics;
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}
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