102 lines
2.3 KiB
JavaScript
102 lines
2.3 KiB
JavaScript
import dgram from 'dgram';
|
|
import { Inbound, Outbound } from './defs';
|
|
import { logger } from '../utils';
|
|
|
|
export class UdpInbound extends Inbound {
|
|
|
|
_socket = null;
|
|
|
|
_rinfo = null;
|
|
|
|
constructor(props) {
|
|
super(props);
|
|
this._socket = this._conn;
|
|
}
|
|
|
|
onReceive = (buffer, rinfo) => {
|
|
this._rinfo = rinfo;
|
|
this.emit('data', buffer);
|
|
};
|
|
|
|
write(buffer) {
|
|
const { address, port } = this._rinfo;
|
|
const onSendError = (err) => {
|
|
if (err) {
|
|
logger.warn(`[udp:inbound] [${this.remote}]: ${err.message}`);
|
|
}
|
|
};
|
|
if (this._config.is_client) {
|
|
const isSs = this._config.presets.some(({ name }) => 'ss-base' === name);
|
|
this._socket.send(buffer, port, address, isSs, onSendError);
|
|
} else {
|
|
this._socket.send(buffer, port, address, onSendError);
|
|
}
|
|
}
|
|
|
|
close() {
|
|
if (this._socket !== null && this._socket._handle !== null) {
|
|
// NOTE: prevent close shared udp socket
|
|
// this._socket.close();
|
|
this._socket = null;
|
|
this.emit('close');
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
export class UdpOutbound extends Outbound {
|
|
|
|
_socket = null;
|
|
|
|
_targetHost = null;
|
|
|
|
_targetPort = null;
|
|
|
|
constructor(props) {
|
|
super(props);
|
|
this._socket = dgram.createSocket('udp4');
|
|
this._socket.on('message', this.onReceive);
|
|
}
|
|
|
|
onReceive = (buffer) => {
|
|
this.emit('data', buffer);
|
|
};
|
|
|
|
write(buffer) {
|
|
const host = this._targetHost;
|
|
const port = this._targetPort;
|
|
if (host === null || port === null) {
|
|
logger.error('[udp:outbound] fail to send udp data, target address was not initialized.');
|
|
}
|
|
else if (port <= 0 || port >= 65536) {
|
|
logger.error(`[udp:outbound] fail to send udp data, target port "${port}" is invalid.`);
|
|
}
|
|
else {
|
|
this._socket.send(buffer, port, host, (err) => {
|
|
if (err) {
|
|
logger.warn(`[udp:outbound] [${this.remote}]: ${err.message}`);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
connect(host, port) {
|
|
if (this._config.is_client) {
|
|
this._targetHost = this._config.server_host;
|
|
this._targetPort = this._config.server_port;
|
|
} else {
|
|
this._targetHost = host;
|
|
this._targetPort = port;
|
|
}
|
|
}
|
|
|
|
close() {
|
|
if (this._socket !== null && this._socket._handle !== null) {
|
|
this._socket.close();
|
|
this._socket = null;
|
|
this.emit('close');
|
|
}
|
|
}
|
|
|
|
}
|