98 lines
3.3 KiB
JavaScript
98 lines
3.3 KiB
JavaScript
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// Copyright (c) 2022, 2023, Oracle and/or its affiliates.
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//-----------------------------------------------------------------------------
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//
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// This software is dual-licensed to you under the Universal Permissive License
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// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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// either license.
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//
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// If you elect to accept the software under the Apache License, Version 2.0,
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// the following applies:
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//-----------------------------------------------------------------------------
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'use strict';
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const constants = require("../constants.js");
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const Message = require("./base.js");
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/**
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* Executes a Protocol Negotiation RPC function
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*
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* @class ProtocolMessage
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* @extends {Message}
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*/
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class ProtocolMessage extends Message {
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/**
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* Serializes the ProtocolMessage function arguments
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*
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* @param {object} buf input arguments
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*/
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encode(buf) {
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buf.writeUInt8(constants.TNS_MSG_TYPE_PROTOCOL);
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buf.writeUInt8(6); // protocol version (8.1+)
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buf.writeUInt8(0); // "array" terminator
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buf.writeStr("node-oracledb"); // unique name for driver
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buf.writeUInt8(0);
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}
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processMessage(buf, messageType) {
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if (messageType === constants.TNS_MSG_TYPE_PROTOCOL) {
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this.processProtocolInfo(buf);
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this.endOfResponse = !this.connection.nscon.endOfRequestSupport;
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} else {
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super.processMessage(buf, messageType);
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}
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}
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processProtocolInfo(buf) {
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this.serverVersion = buf.readUInt8();
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buf.skipUB1();
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this.serverBanner = buf.readNullTerminatedBytes(48);
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buf.caps.charSetID = buf.readUInt16LE();
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this.serverFlags = buf.readUInt8();
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const num_elem = buf.readUInt16LE();
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if (num_elem > 0) { // skip elements
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buf.skipBytes(num_elem * 5);
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}
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const fdoLen = buf.readUInt16BE();
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const fdo = buf.readBytes(fdoLen);
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const ix = 6 + fdo[5] + fdo[6];
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buf.caps.nCharsetId = (fdo[ix + 3] << 8) + fdo[ix + 4];
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const serverCompileCaps = buf.readBytesWithLength();
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if (serverCompileCaps) {
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this.serverCompileCaps = Buffer.from(serverCompileCaps);
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buf.caps.adjustForServerCompileCaps(this.serverCompileCaps, this.connection.nscon);
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// Set the maximum OSON field name size
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if (buf.caps.ttcFieldVersion >= constants.TNS_CCAP_FIELD_VERSION_23_1) {
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this.connection._osonMaxFieldNameSize = 65535;
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} else {
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this.connection._osonMaxFieldNameSize = 255;
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}
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}
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const serverRunTimeCaps = buf.readBytesWithLength();
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if (serverRunTimeCaps) {
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this.serverRunTimeCaps = Buffer.from(serverRunTimeCaps);
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buf.caps.adjustForServerRuntimeCaps(this.serverRunTimeCaps);
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}
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}
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}
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module.exports = ProtocolMessage;
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