tedious
Version:
A TDS driver, for connecting to MS SQLServer databases.
191 lines (190 loc) • 23.1 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.TYPE = exports.Packet = exports.OFFSET = exports.HEADER_LENGTH = void 0;
exports.isPacketComplete = isPacketComplete;
exports.packetLength = packetLength;
var _sprintfJs = require("sprintf-js");
const HEADER_LENGTH = exports.HEADER_LENGTH = 8;
const TYPE = exports.TYPE = {
SQL_BATCH: 0x01,
RPC_REQUEST: 0x03,
TABULAR_RESULT: 0x04,
ATTENTION: 0x06,
BULK_LOAD: 0x07,
TRANSACTION_MANAGER: 0x0E,
LOGIN7: 0x10,
NTLMAUTH_PKT: 0x11,
PRELOGIN: 0x12,
FEDAUTH_TOKEN: 0x08
};
const typeByValue = {};
for (const name in TYPE) {
typeByValue[TYPE[name]] = name;
}
const STATUS = {
NORMAL: 0x00,
EOM: 0x01,
IGNORE: 0x02,
RESETCONNECTION: 0x08,
RESETCONNECTIONSKIPTRAN: 0x10
};
const OFFSET = exports.OFFSET = {
Type: 0,
Status: 1,
Length: 2,
SPID: 4,
PacketID: 6,
Window: 7
};
const DEFAULT_SPID = 0;
const DEFAULT_PACKETID = 1;
const DEFAULT_WINDOW = 0;
const NL = '\n';
class Packet {
constructor(typeOrBuffer) {
if (typeOrBuffer instanceof Buffer) {
this.buffer = typeOrBuffer;
} else {
const type = typeOrBuffer;
this.buffer = Buffer.alloc(HEADER_LENGTH, 0);
this.buffer.writeUInt8(type, OFFSET.Type);
this.buffer.writeUInt8(STATUS.NORMAL, OFFSET.Status);
this.buffer.writeUInt16BE(DEFAULT_SPID, OFFSET.SPID);
this.buffer.writeUInt8(DEFAULT_PACKETID, OFFSET.PacketID);
this.buffer.writeUInt8(DEFAULT_WINDOW, OFFSET.Window);
this.setLength();
}
}
setLength() {
this.buffer.writeUInt16BE(this.buffer.length, OFFSET.Length);
}
length() {
return this.buffer.readUInt16BE(OFFSET.Length);
}
resetConnection(reset) {
let status = this.buffer.readUInt8(OFFSET.Status);
if (reset) {
status |= STATUS.RESETCONNECTION;
} else {
status &= 0xFF - STATUS.RESETCONNECTION;
}
this.buffer.writeUInt8(status, OFFSET.Status);
}
last(last) {
let status = this.buffer.readUInt8(OFFSET.Status);
if (arguments.length > 0) {
if (last) {
status |= STATUS.EOM;
} else {
status &= 0xFF - STATUS.EOM;
}
this.buffer.writeUInt8(status, OFFSET.Status);
}
return this.isLast();
}
ignore(last) {
let status = this.buffer.readUInt8(OFFSET.Status);
if (last) {
status |= STATUS.IGNORE;
} else {
status &= 0xFF - STATUS.IGNORE;
}
this.buffer.writeUInt8(status, OFFSET.Status);
}
isLast() {
return !!(this.buffer.readUInt8(OFFSET.Status) & STATUS.EOM);
}
packetId(packetId) {
if (packetId) {
this.buffer.writeUInt8(packetId % 256, OFFSET.PacketID);
}
return this.buffer.readUInt8(OFFSET.PacketID);
}
addData(data) {
this.buffer = Buffer.concat([this.buffer, data]);
this.setLength();
return this;
}
data() {
return this.buffer.slice(HEADER_LENGTH);
}
type() {
return this.buffer.readUInt8(OFFSET.Type);
}
statusAsString() {
const status = this.buffer.readUInt8(OFFSET.Status);
const statuses = [];
for (const name in STATUS) {
const value = STATUS[name];
if (status & value) {
statuses.push(name);
} else {
statuses.push(undefined);
}
}
return statuses.join(' ').trim();
}
headerToString(indent = '') {
const text = (0, _sprintfJs.sprintf)('type:0x%02X(%s), status:0x%02X(%s), length:0x%04X, spid:0x%04X, packetId:0x%02X, window:0x%02X', this.buffer.readUInt8(OFFSET.Type), typeByValue[this.buffer.readUInt8(OFFSET.Type)], this.buffer.readUInt8(OFFSET.Status), this.statusAsString(), this.buffer.readUInt16BE(OFFSET.Length), this.buffer.readUInt16BE(OFFSET.SPID), this.buffer.readUInt8(OFFSET.PacketID), this.buffer.readUInt8(OFFSET.Window));
return indent + text;
}
dataToString(indent = '') {
const BYTES_PER_GROUP = 0x04;
const CHARS_PER_GROUP = 0x08;
const BYTES_PER_LINE = 0x20;
const data = this.data();
let dataDump = '';
let chars = '';
for (let offset = 0; offset < data.length; offset++) {
if (offset % BYTES_PER_LINE === 0) {
dataDump += indent;
dataDump += (0, _sprintfJs.sprintf)('%04X ', offset);
}
if (data[offset] < 0x20 || data[offset] > 0x7E) {
chars += '.';
if ((offset + 1) % CHARS_PER_GROUP === 0 && !((offset + 1) % BYTES_PER_LINE === 0)) {
chars += ' ';
}
} else {
chars += String.fromCharCode(data[offset]);
}
if (data[offset] != null) {
dataDump += (0, _sprintfJs.sprintf)('%02X', data[offset]);
}
if ((offset + 1) % BYTES_PER_GROUP === 0 && !((offset + 1) % BYTES_PER_LINE === 0)) {
dataDump += ' ';
}
if ((offset + 1) % BYTES_PER_LINE === 0) {
dataDump += ' ' + chars;
chars = '';
if (offset < data.length - 1) {
dataDump += NL;
}
}
}
if (chars.length) {
dataDump += ' ' + chars;
}
return dataDump;
}
toString(indent = '') {
return this.headerToString(indent) + '\n' + this.dataToString(indent + indent);
}
payloadString() {
return '';
}
}
exports.Packet = Packet;
function isPacketComplete(potentialPacketBuffer) {
if (potentialPacketBuffer.length < HEADER_LENGTH) {
return false;
} else {
return potentialPacketBuffer.length >= potentialPacketBuffer.readUInt16BE(OFFSET.Length);
}
}
function packetLength(potentialPacketBuffer) {
return potentialPacketBuffer.readUInt16BE(OFFSET.Length);
}
//# 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{ sprintf } from 'sprintf-js';\n\nexport const HEADER_LENGTH = 8;\n\nexport const TYPE: { [key: string]: number } = {\n  SQL_BATCH: 0x01,\n  RPC_REQUEST: 0x03,\n  TABULAR_RESULT: 0x04,\n  ATTENTION: 0x06,\n  BULK_LOAD: 0x07,\n  TRANSACTION_MANAGER: 0x0E,\n  LOGIN7: 0x10,\n  NTLMAUTH_PKT: 0x11,\n  PRELOGIN: 0x12,\n  FEDAUTH_TOKEN: 0x08\n};\n\nconst typeByValue: { [key: number]: string } = {};\n\nfor (const name in TYPE) {\n  typeByValue[TYPE[name]] = name;\n}\n\nconst STATUS: { [key: string]: number } = {\n  NORMAL: 0x00,\n  EOM: 0x01,\n  IGNORE: 0x02,\n  RESETCONNECTION: 0x08,\n  RESETCONNECTIONSKIPTRAN: 0x10\n};\n\nexport const OFFSET = {\n  Type: 0,\n  Status: 1,\n  Length: 2,\n  SPID: 4,\n  PacketID: 6,\n  Window: 7\n};\n\nconst DEFAULT_SPID = 0;\n\nconst DEFAULT_PACKETID = 1;\n\nconst DEFAULT_WINDOW = 0;\n\nconst NL = '\\n';\n\nexport class Packet {\n  declare buffer: Buffer;\n\n  constructor(typeOrBuffer: Buffer | number) {\n    if (typeOrBuffer instanceof Buffer) {\n      this.buffer = typeOrBuffer;\n    } else {\n      const type = typeOrBuffer;\n      this.buffer = Buffer.alloc(HEADER_LENGTH, 0);\n      this.buffer.writeUInt8(type, OFFSET.Type);\n      this.buffer.writeUInt8(STATUS.NORMAL, OFFSET.Status);\n      this.buffer.writeUInt16BE(DEFAULT_SPID, OFFSET.SPID);\n      this.buffer.writeUInt8(DEFAULT_PACKETID, OFFSET.PacketID);\n      this.buffer.writeUInt8(DEFAULT_WINDOW, OFFSET.Window);\n      this.setLength();\n    }\n  }\n\n  setLength() {\n    this.buffer.writeUInt16BE(this.buffer.length, OFFSET.Length);\n  }\n\n  length() {\n    return this.buffer.readUInt16BE(OFFSET.Length);\n  }\n\n  resetConnection(reset: boolean) {\n    let status = this.buffer.readUInt8(OFFSET.Status);\n    if (reset) {\n      status |= STATUS.RESETCONNECTION;\n    } else {\n      status &= 0xFF - STATUS.RESETCONNECTION;\n    }\n    this.buffer.writeUInt8(status, OFFSET.Status);\n  }\n\n  last(last?: boolean) {\n    let status = this.buffer.readUInt8(OFFSET.Status);\n    if (arguments.length > 0) {\n      if (last) {\n        status |= STATUS.EOM;\n      } else {\n        status &= 0xFF - STATUS.EOM;\n      }\n      this.buffer.writeUInt8(status, OFFSET.Status);\n    }\n    return this.isLast();\n  }\n\n  ignore(last: boolean) {\n    let status = this.buffer.readUInt8(OFFSET.Status);\n    if (last) {\n      status |= STATUS.IGNORE;\n    } else {\n      status &= 0xFF - STATUS.IGNORE;\n    }\n    this.buffer.writeUInt8(status, OFFSET.Status);\n  }\n\n  isLast() {\n    return !!(this.buffer.readUInt8(OFFSET.Status) & STATUS.EOM);\n  }\n\n  packetId(packetId?: number) {\n    if (packetId) {\n      this.buffer.writeUInt8(packetId % 256, OFFSET.PacketID);\n    }\n    return this.buffer.readUInt8(OFFSET.PacketID);\n  }\n\n  addData(data: Buffer) {\n    this.buffer = Buffer.concat([this.buffer, data]);\n    this.setLength();\n    return this;\n  }\n\n  data() {\n    return this.buffer.slice(HEADER_LENGTH);\n  }\n\n  type() {\n    return this.buffer.readUInt8(OFFSET.Type);\n  }\n\n  statusAsString() {\n    const status = this.buffer.readUInt8(OFFSET.Status);\n    const statuses = [];\n\n    for (const name in STATUS) {\n      const value = STATUS[name];\n\n      if (status & value) {\n        statuses.push(name);\n      } else {\n        statuses.push(undefined);\n      }\n    }\n\n    return statuses.join(' ').trim();\n  }\n\n  headerToString(indent = '') {\n    const text = sprintf('type:0x%02X(%s), status:0x%02X(%s), length:0x%04X, spid:0x%04X, packetId:0x%02X, window:0x%02X', this.buffer.readUInt8(OFFSET.Type), typeByValue[this.buffer.readUInt8(OFFSET.Type)], this.buffer.readUInt8(OFFSET.Status), this.statusAsString(), this.buffer.readUInt16BE(OFFSET.Length), this.buffer.readUInt16BE(OFFSET.SPID), this.buffer.readUInt8(OFFSET.PacketID), this.buffer.readUInt8(OFFSET.Window));\n    return indent + text;\n  }\n\n  dataToString(indent = '') {\n    const BYTES_PER_GROUP = 0x04;\n    const CHARS_PER_GROUP = 0x08;\n    const BYTES_PER_LINE = 0x20;\n    const data = this.data();\n\n    let dataDump = '';\n    let chars = '';\n\n\n    for (let offset = 0; offset < data.length; offset++) {\n      if (offset % BYTES_PER_LINE === 0) {\n        dataDump += indent;\n        dataDump += sprintf('%04X  ', offset);\n      }\n\n      if (data[offset] < 0x20 || data[offset] > 0x7E) {\n        chars += '.';\n        if (((offset + 1) % CHARS_PER_GROUP === 0) && !((offset + 1) % BYTES_PER_LINE === 0)) {\n          chars += ' ';\n        }\n      } else {\n        chars += String.fromCharCode(data[offset]);\n      }\n\n      if (data[offset] != null) {\n        dataDump += sprintf('%02X', data[offset]);\n      }\n\n      if (((offset + 1) % BYTES_PER_GROUP === 0) && !((offset + 1) % BYTES_PER_LINE === 0)) {\n        dataDump += ' ';\n      }\n\n      if ((offset + 1) % BYTES_PER_LINE === 0) {\n        dataDump += '  ' + chars;\n        chars = '';\n        if (offset < data.length - 1) {\n          dataDump += NL;\n        }\n      }\n    }\n\n    if (chars.length) {\n      dataDump += '  ' + chars;\n    }\n\n    return dataDump;\n  }\n\n  toString(indent = '') {\n    return this.headerToString(indent) + '\\n' + this.dataToString(indent + indent);\n  }\n\n  payloadString() {\n    return '';\n  }\n}\n\nexport function isPacketComplete(potentialPacketBuffer: Buffer) {\n  if (potentialPacketBuffer.length < HEADER_LENGTH) {\n    return false;\n  } else {\n    return potentialPacketBuffer.length >= potentialPacketBuffer.readUInt16BE(OFFSET.Length);\n  }\n}\n\nexport function packetLength(potentialPacketBuffer: Buffer) {\n  return 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