James Coglan
78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
'use strict';
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var util = require('util'),
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common = require('./common'),
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Session = require('./session');
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var ClientSession = function(options) {
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Session.call(this, options);
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};
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util.inherits(ClientSession, Session);
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ClientSession.validParams = function(params) {
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if (!common.validParams(params)) return false;
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if (params.hasOwnProperty('client_max_window_bits')) {
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if (common.VALID_WINDOW_BITS.indexOf(params.client_max_window_bits) < 0)
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return false;
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}
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return true;
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};
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ClientSession.prototype.generateOffer = function() {
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var offer = {};
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if (this._acceptNoContextTakeover)
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offer.client_no_context_takeover = true;
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if (this._acceptMaxWindowBits !== undefined) {
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if (common.VALID_WINDOW_BITS.indexOf(this._acceptMaxWindowBits) < 0) {
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throw new Error('Invalid value for maxWindowBits');
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}
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offer.client_max_window_bits = this._acceptMaxWindowBits;
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} else {
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offer.client_max_window_bits = true;
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}
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if (this._requestNoContextTakeover)
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offer.server_no_context_takeover = true;
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if (this._requestMaxWindowBits !== undefined) {
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if (common.VALID_WINDOW_BITS.indexOf(this._requestMaxWindowBits) < 0) {
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throw new Error('Invalid value for requestMaxWindowBits');
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}
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offer.server_max_window_bits = this._requestMaxWindowBits;
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}
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return offer;
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};
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ClientSession.prototype.activate = function(params) {
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if (!ClientSession.validParams(params)) return false;
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if (this._acceptMaxWindowBits && params.client_max_window_bits) {
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if (params.client_max_window_bits > this._acceptMaxWindowBits) return false;
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}
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if (this._requestNoContextTakeover && !params.server_no_context_takeover)
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return false;
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if (this._requestMaxWindowBits) {
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if (!params.server_max_window_bits) return false;
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if (params.server_max_window_bits > this._requestMaxWindowBits) return false;
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}
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this._ownContextTakeover = !(this._acceptNoContextTakeover || params.client_no_context_takeover);
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this._ownWindowBits = Math.min(
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this._acceptMaxWindowBits || common.MAX_WINDOW_BITS,
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params.client_max_window_bits || common.MAX_WINDOW_BITS
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);
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this._peerContextTakeover = !params.server_no_context_takeover;
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this._peerWindowBits = params.server_max_window_bits || common.MAX_WINDOW_BITS;
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return true;
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};
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module.exports = ClientSession;
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