zigbee-herdsman
Version:
An open source ZigBee gateway solution with node.js.
88 lines • 4.39 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ZclHeader = void 0;
const logger_1 = require("../../utils/logger");
const buffaloZcl_1 = require("./buffaloZcl");
const enums_1 = require("./definition/enums");
const NS = "zh:zcl:header";
const HEADER_MINIMAL_LENGTH = 3;
const HEADER_WITH_MANUF_LENGTH = HEADER_MINIMAL_LENGTH + 2;
/** ZCL Header frame control frame type */
const HEADER_CTRL_FRAME_TYPE_MASK = 0x03;
const HEADER_CTRL_FRAME_TYPE_BIT = 0;
/** ZCL Header frame control manufacturer specific */
const HEADER_CTRL_MANUF_SPE_MASK = 0x04;
const HEADER_CTRL_MANUF_SPE_BIT = 2;
/** ZCL Header frame control direction */
const HEADER_CTRL_DIRECTION_MASK = 0x08;
const HEADER_CTRL_DIRECTION_BIT = 3;
/** ZCL Header frame control disable default response */
const HEADER_CTRL_DISABLE_DEF_RESP_MASK = 0x10;
const HEADER_CTRL_DISABLE_DEF_RESP_BIT = 4;
/** ZCL Header frame control reserved */
const HEADER_CTRL_RESERVED_MASK = 0xe0;
const HEADER_CTRL_RESERVED_BIT = 5;
class ZclHeader {
frameControl;
manufacturerCode;
transactionSequenceNumber;
commandIdentifier;
constructor(frameControl, manufacturerCode, transactionSequenceNumber, commandIdentifier) {
this.frameControl = frameControl;
this.manufacturerCode = manufacturerCode;
this.transactionSequenceNumber = transactionSequenceNumber;
this.commandIdentifier = commandIdentifier;
}
/** Returns the amount of bytes used by this header */
get length() {
return this.manufacturerCode === undefined ? HEADER_MINIMAL_LENGTH : HEADER_WITH_MANUF_LENGTH;
}
get isGlobal() {
return this.frameControl.frameType === enums_1.FrameType.GLOBAL;
}
get isSpecific() {
return this.frameControl.frameType === enums_1.FrameType.SPECIFIC;
}
write(buffalo) {
const frameControl = ((this.frameControl.frameType << HEADER_CTRL_FRAME_TYPE_BIT) & HEADER_CTRL_FRAME_TYPE_MASK) |
(((this.frameControl.manufacturerSpecific ? 1 : 0) << HEADER_CTRL_MANUF_SPE_BIT) & HEADER_CTRL_MANUF_SPE_MASK) |
((this.frameControl.direction << HEADER_CTRL_DIRECTION_BIT) & HEADER_CTRL_DIRECTION_MASK) |
(((this.frameControl.disableDefaultResponse ? 1 : 0) << HEADER_CTRL_DISABLE_DEF_RESP_BIT) & HEADER_CTRL_DISABLE_DEF_RESP_MASK) |
((this.frameControl.reservedBits << HEADER_CTRL_RESERVED_BIT) & HEADER_CTRL_RESERVED_MASK);
buffalo.writeUInt8(frameControl);
if (this.frameControl.manufacturerSpecific && this.manufacturerCode) {
buffalo.writeUInt16(this.manufacturerCode);
}
buffalo.writeUInt8(this.transactionSequenceNumber);
buffalo.writeUInt8(this.commandIdentifier);
}
static fromBuffer(buffer) {
// Returns `undefined` in case the ZclHeader cannot be parsed.
if (buffer.length < HEADER_MINIMAL_LENGTH) {
logger_1.logger.debug("ZclHeader is too short.", NS);
return undefined;
}
const buffalo = new buffaloZcl_1.BuffaloZcl(buffer);
const frameControlValue = buffalo.readUInt8();
const frameControl = {
frameType: (frameControlValue & HEADER_CTRL_FRAME_TYPE_MASK) >> HEADER_CTRL_FRAME_TYPE_BIT,
manufacturerSpecific: (frameControlValue & HEADER_CTRL_MANUF_SPE_MASK) >> HEADER_CTRL_MANUF_SPE_BIT === 1,
direction: (frameControlValue & HEADER_CTRL_DIRECTION_MASK) >> HEADER_CTRL_DIRECTION_BIT,
disableDefaultResponse: (frameControlValue & HEADER_CTRL_DISABLE_DEF_RESP_MASK) >> HEADER_CTRL_DISABLE_DEF_RESP_BIT === 1,
reservedBits: (frameControlValue & HEADER_CTRL_RESERVED_MASK) >> HEADER_CTRL_RESERVED_BIT,
};
let manufacturerCode;
if (frameControl.manufacturerSpecific) {
if (buffer.length < HEADER_WITH_MANUF_LENGTH) {
logger_1.logger.debug("ZclHeader is too short for control with manufacturer-specific.", NS);
return undefined;
}
manufacturerCode = buffalo.readUInt16();
}
const transactionSequenceNumber = buffalo.readUInt8();
const commandIdentifier = buffalo.readUInt8();
return new ZclHeader(frameControl, manufacturerCode, transactionSequenceNumber, commandIdentifier);
}
}
exports.ZclHeader = ZclHeader;
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