node-red-contrib-knx-ultimate
Version:
Control your KNX intallation via Node-Red! Single Node KNX IN/OUT with optional ETS group address importer. Easy to use and highly configurable.
46 lines • 1.89 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.KNXTunnelingRequest = void 0;
const KNXPacket = require("./KNXPacket");
const KNXConstants = require("./KNXConstants");
const CEMIFactory = require("./cEMI/CEMIFactory");
class KNXTunnelingRequest extends KNXPacket.KNXPacket {
constructor(channelID, seqCounter, cEMIMessage) {
super(KNXConstants.KNX_CONSTANTS.TUNNELING_REQUEST, 4 + cEMIMessage.length);
this.channelID = channelID;
this.seqCounter = seqCounter;
this.cEMIMessage = cEMIMessage;
}
static parseCEMIMessage(buffer, offset) {
if (offset > buffer.length) {
throw new Error('Buffer too short');
}
const msgCode = buffer.readUInt8(offset++);
return CEMIFactory.CEMIFactory.createFromBuffer(msgCode, buffer, offset);
}
static createFromBuffer(buffer, offset = 0) {
if (offset >= buffer.length) {
throw new Error('Buffer too short');
}
const structureLength = buffer.readUInt8(offset);
if (offset + structureLength > buffer.length) {
throw new Error('Buffer too short');
}
offset += 1;
const channelID = buffer.readUInt8(offset++);
const seqCounter = buffer.readUInt8(offset++);
offset++;
const cEMIMessage = this.parseCEMIMessage(buffer, offset);
return new KNXTunnelingRequest(channelID, seqCounter, cEMIMessage);
}
toBuffer() {
const buffer = Buffer.alloc(4);
buffer.writeUInt8(4, 0);
buffer.writeUInt8(this.channelID, 1);
buffer.writeUInt8(this.seqCounter, 2);
buffer.writeUInt8(0, 3);
return Buffer.concat([this.header.toBuffer(), buffer, this.cEMIMessage.toBuffer()]);
}
}
exports.KNXTunnelingRequest = KNXTunnelingRequest;
//# sourceMappingURL=KNXTunnelingRequest.js.map