// Response message type.// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.// // Permission is hereby granted, free of charge, to any person obtaining a copy of this// software and associated documentation files (the "Software"), to deal in the Software// without restriction, including without limitation the rights to use, copy, modify, merge,// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons// to whom the Software is furnished to do so, subject to the following conditions:// // The above copyright notice and this permission notice shall be included in all copies or// substantial portions of the Software.// // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER// DEALINGS IN THE SOFTWARE. /* * Created by SharpDevelop. * User: lextm * Date: 2008/5/1 * Time: 18:13 *  * To change this template use Tools | Options | Coding | Edit Standard Headers. */using System;using System.Collections.Generic;using System.Globalization;using GSF.Net.Snmp.Security; namespace GSF.Net.Snmp.Messaging{    /// <summary>    /// Response message.    /// </summary>    public sealed class ResponseMessage : ISnmpMessage    {        private readonly byte[] _bytes;         /// <summary>        /// Creates a <see cref="ResponseMessage"/> with all contents.        /// </summary>        /// <param name="requestId">Request ID.</param>        /// <param name="version">Protocol version.</param>        /// <param name="community">Community name.</param>        /// <param name="error">Error code.</param>        /// <param name="index">Error index.</param>        /// <param name="variables">Variables.</param>        public ResponseMessage(int requestId, VersionCode version, OctetString community, ErrorCode error, int index, IList<Variable> variables)        {            if (variables == null)            {                throw new ArgumentNullException(nameof(variables));            }             if (community == null)            {                throw new ArgumentNullException(nameof(community));            }             if (version == VersionCode.V3)            {                throw new ArgumentException("Please use overload constructor for v3.", nameof(version));            }             Version = version;            Header = Header.Empty;            Parameters = SecurityParameters.Create(community);            ResponsePdu pdu = new ResponsePdu(                requestId,                error,                index,                variables);            Scope = new Scope(pdu);            Privacy = DefaultPrivacyProvider.DefaultPair;             _bytes = this.PackMessage(null).ToBytes();        }         /// <summary>        /// Initializes a new instance of the <see cref="ResponseMessage"/> class.        /// </summary>        /// <param name="version">The version.</param>        /// <param name="header">The header.</param>        /// <param name="parameters">The parameters.</param>        /// <param name="scope">The scope.</param>        /// <param name="privacy">The privacy provider.</param>        /// <param name="needAuthentication">if set to <c>true</c>, authentication is needed.</param>        /// <param name="length">The length bytes.</param>        public ResponseMessage(VersionCode version, Header header, SecurityParameters parameters, Scope scope, IPrivacyProvider privacy, bool needAuthentication, byte[] length)        {            if (scope == null)            {                throw new ArgumentNullException(nameof(scope));            }             if (parameters == null)            {                throw new ArgumentNullException(nameof(parameters));            }             if (header == null)            {                throw new ArgumentNullException(nameof(header));            }             if (privacy == null)            {                throw new ArgumentNullException(nameof(privacy));            }             Version = version;            Header = header;            Parameters = parameters;            Scope = scope;            Privacy = privacy;             if (needAuthentication)            {                Privacy.ComputeHash(Version, Header, Parameters, Scope);            }             _bytes = this.PackMessage(length).ToBytes();        }         /// <summary>        /// Gets the header.        /// </summary>        public Header Header { get; private set; }                /// <summary>        /// Gets the privacy provider.        /// </summary>        /// <value>The privacy provider.</value>        public IPrivacyProvider Privacy { get; private set; }         /// <summary>        /// Error status.        /// </summary>        public ErrorCode ErrorStatus        {            get { return Scope.Pdu.ErrorStatus.ToErrorCode(); }        }         /// <summary>        /// Error index.        /// </summary>        public int ErrorIndex        {            get { return Scope.Pdu.ErrorIndex.ToInt32(); }        }         /// <summary>        /// Gets the version.        /// </summary>        /// <value>The version.</value>        public VersionCode Version { get; private set; }         /// <summary>        /// Gets the parameters.        /// </summary>        /// <value>The parameters.</value>        public SecurityParameters Parameters { get; private set; }         /// <summary>        /// Gets the scope.        /// </summary>        /// <value>The scope.</value>        public Scope Scope { get; private set; }         /// <summary>        /// Converts to byte format.        /// </summary>        /// <returns></returns>        public byte[] ToBytes()        {            return _bytes;        }         /// <summary>        /// Returns a <see cref="string"/> that represents this <see cref="ResponseMessage"/>.        /// </summary>        /// <returns></returns>        public override string ToString()        {            return string.Format(CultureInfo.InvariantCulture, "Response message: version: {0}; {1}; {2}", Version, Parameters.UserName, Scope.Pdu);        }    }}