/**
 * S7 PLC Server Types and Constants
 * Based on the SNAP7 library and S7 protocol specification
 */
import { Buffer } from 'buffer';
export type byte = number;
export type word = number;
export type longword = number;
export declare enum S7Area {
    PE = 129,// Process inputs
    PA = 130,// Process outputs
    MK = 131,// Merkers
    DB = 132,// Data blocks
    CT = 28,// Counters
    TM = 29
}
export declare enum S7WordLength {
    Bit = 1,
    Byte = 2,
    Word = 4,
    DWord = 6,
    Real = 8,
    Counter = 28,
    Timer = 29
}
export declare enum Operation {
    Read = 0,
    Write = 1
}
export declare enum ServerStatus {
    Stopped = 0,
    Running = 1,
    Error = 2
}
export declare enum CpuStatus {
    Unknown = 0,
    Run = 8,
    Stop = 4
}
export declare enum EventCode {
    ServerStarted = 1,
    ServerStopped = 2,
    ListenerCannotStart = 4,
    ClientAdded = 8,
    ClientRejected = 16,
    ClientNoRoom = 32,
    ClientException = 64,
    ClientDisconnected = 128,
    ClientTerminated = 256,
    ClientsDropped = 512,
    PDUIncoming = 65536,
    DataRead = 131072,
    DataWrite = 262144,
    NegotiatePDU = 524288,
    ReadSZL = 1048576,
    Clock = 2097152,
    Upload = 4194304,
    Download = 8388608,
    Directory = 16777216,
    Security = 33554432,
    Control = 67108864,
    All = 4294967295,
    None = 0
}
export declare enum EventResult {
    NoError = 0,
    FragmentRejected = 1,
    MalformedPDU = 2,
    SparseBytes = 3,
    CannotHandlePDU = 4,
    NotImplemented = 5,
    ErrException = 6,
    ErrAreaNotFound = 7,
    ErrOutOfRange = 8,
    ErrOverPDU = 9,
    ErrTransportSize = 10,
    InvalidGroupUData = 11,
    InvalidSZL = 12,
    DataSizeMismatch = 13,
    CannotUpload = 14,
    CannotDownload = 15,
    UploadInvalidID = 16,
    ResNotFound = 17
}
export declare enum ServerParam {
    LocalPort = 1,
    WorkInterval = 6,
    PDURequest = 10,
    MaxClients = 11
}
export declare enum ServerError {
    CannotStart = 1048576,
    DBNullPointer = 2097152,
    AreaAlreadyExists = 3145728,
    UnknownArea = 4194304,
    InvalidParams = 5242880,
    TooManyDB = 6291456,
    InvalidParamNumber = 7340032,
    CannotChangeParam = 8388608
}
export interface S7Tag {
    Area: S7Area;
    DBNumber: number;
    Start: number;
    Size: number;
    WordLen: S7WordLength;
}
export interface S7ServerEvent {
    EvtTime: Date;
    EvtSender: string;
    EvtCode: EventCode;
    EvtRetCode: EventResult;
    EvtParam1: number;
    EvtParam2: number;
    EvtParam3: number;
    EvtParam4: number;
}
export interface BufferInfo {
    buffer: Buffer;
    size: number;
    locked: boolean;
}
export interface ClientInfo {
    id: string;
    address: string;
    port: number;
    connected: boolean;
    lastActivity: Date;
}
export interface ServerConfig {
    localPort: number;
    workInterval: number;
    pduRequest: number;
    maxClients: number;
    resourceless: boolean;
    eventMask: longword;
}
export type RWAreaCallback = (sender: string, operation: Operation, tag: S7Tag, buffer: Buffer, callback: (data?: Buffer) => void) => void;
export type EventCallback = (event: S7ServerEvent) => void;
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