routeros-api
Version:
Mikrotik Routerboard RouterOS API for NodeJS
417 lines • 29 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RouterOSAPI = void 0;
const Connector_1 = require("./connector/Connector");
const Channel_1 = require("./Channel");
const RosException_1 = require("./RosException");
const RStream_1 = require("./RStream");
const crypto = require("crypto");
const debug = require("debug");
const timers_1 = require("timers");
const events_1 = require("events");
const info = debug('routeros-api:api:info');
const error = debug('routeros-api:api:error');
/**
* Creates a connection object with the credentials provided
*/
class RouterOSAPI extends events_1.EventEmitter {
/**
* Constructor, also sets the language of the thrown errors
*
* @param {Object} options
*/
constructor(options) {
super();
/**
* Connected flag
*/
this.connected = false;
/**
* Connecting flag
*/
this.connecting = false;
/**
* Closing flag
*/
this.closing = false;
/**
* Counter for channels open
*/
this.channelsOpen = 0;
/**
* Flag if the connection was held by the keepalive parameter
* or keepaliveBy function
*/
this.holdingConnectionWithKeepalive = false;
this.registeredStreams = [];
this.setOptions(options);
}
/**
* Set connection options, affects before connecting
*
* @param options connection options
*/
setOptions(options) {
this.host = options.host;
this.user = options.user;
this.password = options.password;
this.port = options.port || 8728;
this.timeout = options.timeout || 10;
this.tls = options.tls;
this.keepalive = options.keepalive || false;
}
/**
* Tries a connection to the routerboard with the provided credentials
*
* @returns {Promise}
*/
connect() {
if (this.connecting)
return Promise.reject('ALRDYCONNECTING');
if (this.connected)
return Promise.resolve(this);
info('Connecting on %s', this.host);
this.connecting = true;
this.connected = false;
this.connector = new Connector_1.Connector({
host: this.host,
port: this.port,
timeout: this.timeout,
tls: this.tls,
});
return new Promise((resolve, reject) => {
const endListener = (e) => {
this.stopAllStreams();
this.connected = false;
this.connecting = false;
if (e)
reject(e);
};
this.connector.once('error', endListener);
this.connector.once('timeout', endListener);
this.connector.once('close', () => {
this.emit('close');
endListener();
});
this.connector.once('connected', () => {
this.login()
.then(() => {
this.connecting = false;
this.connected = true;
this.connector.removeListener('error', endListener);
this.connector.removeListener('timeout', endListener);
const connectedErrorListener = (e) => {
this.connected = false;
this.connecting = false;
this.emit('error', e);
};
this.connector.once('error', connectedErrorListener);
this.connector.once('timeout', connectedErrorListener);
if (this.keepalive)
this.keepaliveBy('#');
info('Logged in on %s', this.host);
resolve(this);
})
.catch((e) => {
this.connecting = false;
this.connected = false;
reject(e);
});
});
this.connector.connect();
});
}
/**
* Writes a command over the socket to the routerboard
* on a new channel
*
* @param {string|Array} params
* @param {Array<string|string[]>} moreParams
* @returns {Promise}
*/
write(params, ...moreParams) {
params = this.concatParams(params, moreParams);
let chann = this.openChannel();
this.holdConnection();
chann.once('close', () => {
chann = null; // putting garbage collector to work :]
this.decreaseChannelsOpen();
this.releaseConnectionHold();
});
return chann.write(params);
}
/**
* Writes a command over the socket to the routerboard
* on a new channel and return an event of what happens
* with the responses. Listen for 'data', 'done', 'trap' and 'close'
* events.
*
* @param {string|Array} params
* @param {Array<string|string[]>} moreParams
* @returns {RStream}
*/
writeStream(params, ...moreParams) {
params = this.concatParams(params, moreParams);
const stream = new RStream_1.RStream(this.openChannel(), params);
stream.on('started', () => {
this.holdConnection();
});
stream.on('stopped', () => {
this.unregisterStream(stream);
this.decreaseChannelsOpen();
this.releaseConnectionHold();
});
stream.start();
this.registerStream(stream);
return stream;
}
/**
* Returns a stream object for handling continuous data
* flow.
*
* @param {string|Array} params
* @param {function} callback
* @returns {RStream}
*/
stream(params = [], ...moreParams) {
let callback = moreParams.pop();
if (typeof callback !== 'function') {
if (callback)
moreParams.push(callback);
callback = null;
}
params = this.concatParams(params, moreParams);
const stream = new RStream_1.RStream(this.openChannel(), params, callback);
stream.on('started', () => {
this.holdConnection();
});
stream.on('stopped', () => {
this.unregisterStream(stream);
this.decreaseChannelsOpen();
this.releaseConnectionHold();
stream.removeAllListeners();
});
stream.start();
stream.prepareDebounceEmptyData();
this.registerStream(stream);
return stream;
}
/**
* Keep the connection alive by running a set of
* commands provided instead of the random command
*
* @param {string|Array} params
* @param {function} callback
*/
keepaliveBy(params = [], ...moreParams) {
this.holdingConnectionWithKeepalive = true;
if (this.keptaliveby)
timers_1.clearTimeout(this.keptaliveby);
let callback = moreParams.pop();
if (typeof callback !== 'function') {
if (callback)
moreParams.push(callback);
callback = null;
}
params = this.concatParams(params, moreParams);
const exec = () => {
if (!this.closing) {
if (this.keptaliveby)
timers_1.clearTimeout(this.keptaliveby);
this.keptaliveby = setTimeout(() => {
this.write(params.slice())
.then((data) => {
if (typeof callback === 'function')
callback(null, data);
exec();
})
.catch((err) => {
if (typeof callback === 'function')
callback(err, null);
exec();
});
}, (this.timeout * 1000) / 2);
}
};
exec();
}
/**
* Closes the connection.
* It can be openned again without recreating
* an object from this class.
*
* @returns {Promise}
*/
close() {
if (this.closing) {
return Promise.reject(new RosException_1.RosException('ALRDYCLOSNG'));
}
if (!this.connected) {
return Promise.resolve(this);
}
if (this.connectionHoldInterval) {
timers_1.clearTimeout(this.connectionHoldInterval);
}
timers_1.clearTimeout(this.keptaliveby);
this.stopAllStreams();
return new Promise((resolve) => {
this.closing = true;
this.connector.once('close', () => {
this.connector.destroy();
this.connector = null;
this.closing = false;
this.connected = false;
resolve(this);
});
this.connector.close();
});
}
/**
* Opens a new channel either for just writing or streaming
*
* @returns {Channel}
*/
openChannel() {
this.increaseChannelsOpen();
return new Channel_1.Channel(this.connector);
}
increaseChannelsOpen() {
this.channelsOpen++;
}
decreaseChannelsOpen() {
this.channelsOpen--;
}
registerStream(stream) {
this.registeredStreams.push(stream);
}
unregisterStream(stream) {
this.registeredStreams = this.registeredStreams.filter((registeredStreams) => registeredStreams !== stream);
}
stopAllStreams() {
for (const registeredStream of this.registeredStreams) {
registeredStream.stop();
}
}
/**
* Holds the connection if keepalive wasn't set
* so when a channel opens, ensure that we
* receive a response before a timeout
*/
holdConnection() {
// If it's not the first connection to open
// don't try to hold it again
if (this.channelsOpen !== 1)
return;
if (this.connected && !this.holdingConnectionWithKeepalive) {
if (this.connectionHoldInterval)
timers_1.clearTimeout(this.connectionHoldInterval);
const holdConnInterval = () => {
this.connectionHoldInterval = setTimeout(() => {
let chann = new Channel_1.Channel(this.connector);
chann.on('close', () => {
chann = null;
});
chann
.write(['#'])
.then(() => {
holdConnInterval();
})
.catch(() => {
holdConnInterval();
});
}, (this.timeout * 1000) / 2);
};
holdConnInterval();
}
}
/**
* Release the connection that was held
* when waiting for responses from channels open
*/
releaseConnectionHold() {
// If there are channels still open
// don't release the hold
if (this.channelsOpen > 0)
return;
if (this.connectionHoldInterval)
timers_1.clearTimeout(this.connectionHoldInterval);
}
/**
* Login on the routerboard to provide
* api functionalities, using the credentials
* provided.
*
* @returns {Promise}
*/
login() {
this.connecting = true;
info('Sending 6.43+ login to %s', this.host);
return this.write('/login', [
`=name=${this.user}`,
`=password=${this.password}`,
])
.then((data) => {
if (data.length === 0) {
info('6.43+ Credentials accepted on %s, we are connected', this.host);
return Promise.resolve(this);
}
else if (data.length === 1) {
info('Received challenge on %s, will send credentials. Data: %o', this.host, data);
const challenge = Buffer.alloc(this.password.length + 17);
const challengeOffset = this.password.length + 1;
// Here we have 32 chars with hex encoded 16 bytes of challenge data
const ret = data[0].ret;
challenge.write(String.fromCharCode(0) + this.password);
// To write 32 hec chars to buffer as bytes we need to write 16 bytes
challenge.write(ret, challengeOffset, ret.length / 2, 'hex');
const resp = '00' +
crypto
.createHash('MD5')
.update(challenge)
.digest('hex');
return this.write('/login', [
'=name=' + this.user,
'=response=' + resp,
])
.then(() => {
info('Credentials accepted on %s, we are connected', this.host);
return Promise.resolve(this);
})
.catch((err) => {
if (err.message === 'cannot log in' ||
err.message ===
'invalid user name or password (6)') {
err = new RosException_1.RosException('CANTLOGIN');
}
this.connector.destroy();
error("Couldn't loggin onto %s, Error: %O", this.host, err);
return Promise.reject(err);
});
}
error('Unknown return from /login command on %s, data returned: %O', this.host, data);
Promise.reject(new RosException_1.RosException('CANTLOGIN'));
})
.catch((err) => {
if (err.message === 'cannot log in' ||
err.message === 'invalid user name or password (6)') {
err = new RosException_1.RosException('CANTLOGIN');
}
this.connector.destroy();
error("Couldn't loggin onto %s, Error: %O", this.host, err);
return Promise.reject(err);
});
}
concatParams(firstParameter, parameters) {
if (typeof firstParameter === 'string')
firstParameter = [firstParameter];
for (let parameter of parameters) {
if (typeof parameter === 'string')
parameter = [parameter];
if (parameter.length > 0)
firstParameter = firstParameter.concat(parameter);
}
return firstParameter;
}
}
exports.RouterOSAPI = RouterOSAPI;
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