120 lines
3.8 KiB
C#
120 lines
3.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Tor.Helpers;
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namespace Tor.Controller
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{
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/// <summary>
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/// A class containing the command to create a new circuit.
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/// </summary>
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internal sealed class CreateCircuitCommand : Command<CreateCircuitResponse>
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{
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private readonly List<string> routers;
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/// <summary>
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/// Initializes a new instance of the <see cref="CreateCircuitCommand"/> class.
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/// </summary>
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public CreateCircuitCommand()
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{
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this.routers = new List<string>();
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="CreateCircuitCommand"/> class.
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/// </summary>
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/// <param name="routers">The collection of routers which should be part of this circuit.</param>
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public CreateCircuitCommand(IEnumerable<string> routers)
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{
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this.routers = new List<string>(routers);
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}
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#region Properties
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/// <summary>
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/// Gets a collection containing the list of routers which should be comprise this circuit.
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/// </summary>
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public List<string> Routers
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{
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get { return routers; }
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}
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#endregion
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#region Tor.Controller.Command<>
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/// <summary>
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/// Dispatches the command to the client control port and produces a <typeparamref name="T" /> response result.
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/// </summary>
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/// <param name="connection">The control connection where the command should be dispatched.</param>
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/// <returns>
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/// A <typeparamref name="T" /> object instance containing the response data.
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/// </returns>
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protected override CreateCircuitResponse Dispatch(Connection connection)
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{
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StringBuilder builder = new StringBuilder("extendcircuit 0");
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foreach (string router in routers)
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{
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builder.Append(' ');
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builder.Append(router);
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}
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if (connection.Write(builder.ToString()))
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{
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ConnectionResponse response = connection.Read();
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if (!response.Success)
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return new CreateCircuitResponse(false, -1);
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string[] parts = StringHelper.GetAll(response.Responses[0], ' ');
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if (parts.Length < 2 || !"extended".Equals(parts[0], StringComparison.CurrentCultureIgnoreCase))
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return new CreateCircuitResponse(false, -1);
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int circuitID;
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if (!int.TryParse(parts[1], out circuitID))
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return new CreateCircuitResponse(false, -1);
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return new CreateCircuitResponse(true, circuitID);
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}
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return new CreateCircuitResponse(false, -1);
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}
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#endregion
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}
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/// <summary>
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/// A class containing the response information from a <c>extendcircuit 0</c> command.
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/// </summary>
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internal sealed class CreateCircuitResponse : Response
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{
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private readonly int circuitID;
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/// <summary>
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/// Initializes a new instance of the <see cref="CreateCircuitResponse"/> class.
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/// </summary>
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/// <param name="success">A value indicating whether the command was received and processed successfully.</param>
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/// <param name="circuitID">The unique circuit identifier within the tor service.</param>
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public CreateCircuitResponse(bool success, int circuitID) : base(success)
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{
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this.circuitID = circuitID;
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}
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#region Properties
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/// <summary>
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/// Gets the unique circuit identifier.
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/// </summary>
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public int CircuitID
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{
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get { return circuitID; }
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}
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#endregion
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}
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}
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