ts-bacnet/lib/services/who-is.js

The BACnet protocol library written in pure JavaScript.

"use strict";
/**
 * The whoIs event represents the request for an IAm reponse to detect all
 * devices in a BACNET network.
 *
 * @event bacnet.whoIs
 * @param {number=} lowLimit - The lowest BACnet ID being queried.
 * @param {number=} highLimit - The highest BACnet ID being queried.
 *
 * @example
 * const bacnet = require('ts-bacnet');
 * const client = new bacnet();
 *
 * client.on('whoIs', (msg) => {
 *   console.log(
 *     'address: ', msg.header.address,
 *     ' - lowLimit: ', msg.payload.lowLimit,
 *     ' - highLimit: ', msg.payload.highLimit
 *   );
 * });
 */
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = void 0;
const baAsn1 = __importStar(require("../asn1"));
const baEnum = __importStar(require("../enum"));
const encode = (buffer, lowLimit, highLimit) => {
    if (lowLimit >= 0 &&
        lowLimit <= baEnum.ASN1_MAX_INSTANCE &&
        highLimit >= 0 &&
        highLimit <= baEnum.ASN1_MAX_INSTANCE) {
        baAsn1.encodeContextUnsigned(buffer, 0, lowLimit);
        baAsn1.encodeContextUnsigned(buffer, 1, highLimit);
    }
};
exports.encode = encode;
const decode = (buffer, offset, apduLen) => {
    let len = 0;
    let value = {};
    if (apduLen <= 0) {
        return {}; // TODO: why??
    }
    let result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    len += result.len;
    if (result.tagNumber !== 0) {
        return undefined;
    }
    if (apduLen <= len) {
        return undefined;
    }
    let decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
    len += decodedValue.len;
    if (decodedValue.value <= baEnum.ASN1_MAX_INSTANCE) {
        value.lowLimit = decodedValue.value;
    }
    if (apduLen <= len) {
        return undefined;
    }
    result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    len += result.len;
    if (result.tagNumber !== 1) {
        return undefined;
    }
    if (apduLen <= len) {
        return undefined;
    }
    decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
    len += decodedValue.len;
    if (decodedValue.value <= baEnum.ASN1_MAX_INSTANCE) {
        value.highLimit = decodedValue.value;
    }
    value.len = len;
    return value;
};
exports.decode = decode;