mirror of
https://github.com/xcp-ng/xenadmin.git
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613 lines
26 KiB
C#
613 lines
26 KiB
C#
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/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Security.Cryptography.X509Certificates;
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using System.Net.Security;
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using System.IO;
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using System.Net.Sockets;
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using System.Security.Authentication;
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namespace CommandLib
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{
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public class Config
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{
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public string hostname = ""; // no default hostname
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public string username = "root";
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public string password = "";
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public int port = 443;
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public int block_size = 65536;
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public bool nossl = false;
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public bool debug = false;
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}
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public delegate void delegateGlobalError(String s);
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public delegate void delegateGlobalUsage();
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public delegate void delegateGlobalDebug(String s, thinCLIProtocol tCLIprotocol);
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public delegate void delegateConsoleWrite(String s);
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public delegate void delegateConsoleWriteLine(String s);
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public delegate string delegateConsoleReadLine();
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public delegate void delegateExit(int i);
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public delegate void delegateProgress(int i);
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public class thinCLIProtocol
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{
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public delegateGlobalError dGlobalError;
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public delegateGlobalUsage dGlobalUsage;
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public delegateGlobalDebug dGlobalDebug;
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public delegateConsoleWrite dConsoleWrite;
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public delegateConsoleWriteLine dConsoleWriteLine;
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public delegateConsoleReadLine dConsoleReadLine;
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public delegateProgress dProgress;
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public delegateExit dExit;
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public Config conf;
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public string magic_string = "XenSource thin CLI protocol";
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public int major = 0;
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public int minor = 1;
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public bool dropOut;
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public thinCLIProtocol(delegateGlobalError dGlobalError,
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delegateGlobalUsage dGlobalUsage,
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delegateGlobalDebug dGlobalDebug,
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delegateConsoleWrite dConsoleWrite,
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delegateConsoleWriteLine dConsoleWriteLine,
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delegateConsoleReadLine dConsoleReadLine,
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delegateExit dExit,
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delegateProgress dProgress,
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Config conf)
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{
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this.dGlobalError = dGlobalError;
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this.dGlobalUsage = dGlobalUsage;
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this.dGlobalDebug = dGlobalDebug;
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this.dConsoleWrite = dConsoleWrite;
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this.dConsoleWriteLine = dConsoleWriteLine;
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this.dConsoleReadLine = dConsoleReadLine;
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this.dExit = dExit;
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this.dProgress = dProgress;
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this.conf = conf;
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dropOut = false;
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}
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}
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public class Transport{
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// The following method is invoked by the RemoteCertificateValidationDelegate.
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private static bool ValidateServerCertificate(
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object sender,
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X509Certificate certificate,
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X509Chain chain,
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SslPolicyErrors sslPolicyErrors)
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{
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// Do allow this client to communicate with unauthenticated servers.
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return true;
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}
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public static Stream connect(thinCLIProtocol tCLIprotocol, String hostname, int port)
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{
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if (port != 443){
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TcpClient client = new TcpClient(hostname, port);
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Stream stream = client.GetStream();
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return stream;
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} else {
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TcpClient client = new TcpClient(hostname, port);
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// Create an SSL stream that will close the client's stream.
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SslStream sslStream = new SslStream(
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client.GetStream(),
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false,
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new RemoteCertificateValidationCallback(ValidateServerCertificate),
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null
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);
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try
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{
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sslStream.AuthenticateAsClient("");
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}
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catch (AuthenticationException e){
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if (tCLIprotocol.conf.debug) throw e;
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tCLIprotocol.dGlobalError("Authentication failed - closing the connection.");
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client.Close();
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return null;
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} catch (Exception e) {
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if (tCLIprotocol.conf.debug) throw e;
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tCLIprotocol.dGlobalError("Exception during SSL auth - closing the connection.");
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client.Close();
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return null;
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}
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return sslStream;
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}
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}
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}
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public class HTTP{
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public static string readLine(Stream stream){
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StringBuilder messageData = new StringBuilder();
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do {
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int i = stream.ReadByte();
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if (i == -1)
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{
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throw new EndOfStreamException();
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}
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else
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{
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char b = (char)i;
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messageData.Append(b);
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if (b == '\n') break;
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}
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} while (true);
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return messageData.ToString();
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}
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public static void writeLine(Stream stream, string line){
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byte[] message = Encoding.UTF8.GetBytes(line);
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stream.Write(message, 0, message.Length);
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stream.Flush();
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}
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public static int getResultCode(string line){
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string[] bits = line.Split(new char[] {' '});
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if (bits.Length < 2) return 0;
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return Int32.Parse(bits[1]);
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}
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/// <param name="addr">The target URI, including scheme, hostname and path.</param>
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public static Stream doRPC(String method, Uri uri, thinCLIProtocol tCLIprotocol)
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{
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Stream http = Transport.connect(tCLIprotocol, uri.Host, uri.Port);
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String header = method + " " + uri.PathAndQuery + " HTTP/1.0\r\n\r\n";
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writeLine(http, header);
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String response = readLine(http);
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int code = getResultCode(response);
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switch (code)
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{
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case 200:
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break;
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case 302:
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string url = "";
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while (true)
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{
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response = readLine(http);
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if (response.StartsWith("Location: "))
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url = response.Substring(10);
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if (response.Equals("\r\n") || response.Equals("")) break;
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}
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Uri redirect = new Uri(url.Trim());
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tCLIprotocol.conf.hostname = redirect.Host;
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http.Close();
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return doRPC(method, redirect, tCLIprotocol);
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default:
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tCLIprotocol.dGlobalError("Received an error message from the server doing an HTTP " + method + " " + uri.PathAndQuery + " : " + response);
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http.Close();
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return null;
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}
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while (true)
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{
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response = readLine(http);
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if (response.Equals("\r\n") || response.Equals("")) break;
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}
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// Stream should be positioned after the headers
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return http;
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}
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}
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public class Types{
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public static uint unmarshal_int32(Stream stream){
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uint a = (uint)stream.ReadByte();
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uint b = (uint)stream.ReadByte();
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uint c = (uint)stream.ReadByte();
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uint d = (uint)stream.ReadByte();
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//Console.WriteLine("a = " + a + " b = " + b + " c = " + c + " d = " + d);
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return (a << 0) | (b << 8) | (c << 16) | (d << 24);
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}
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public static void marshal_int32(Stream stream, uint x){
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uint mask = 0xff;
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stream.WriteByte((byte) ((x >> 0) & mask));
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stream.WriteByte((byte) ((x >> 8) & mask));
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stream.WriteByte((byte) ((x >> 16) & mask));
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stream.WriteByte((byte) ((x >> 24) & mask));
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}
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public static int unmarshal_int(Stream stream){
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return (int)unmarshal_int32(stream);
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}
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public static void marshal_int(Stream stream, int x){
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marshal_int32(stream, (uint)x);
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}
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public static byte[] unmarshal_n(Stream stream, uint n){
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byte[] buffer = new byte[n];
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int toread = (int)n;
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int offset = 0;
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while (toread > 0){
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int nread = stream.Read(buffer, offset, toread);
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offset= nread; toread -= nread;
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}
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return buffer;
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}
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public static string unmarshal_string(Stream stream){
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uint length = unmarshal_int32(stream);
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byte[] buffer = unmarshal_n(stream, length);
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Decoder decoder = Encoding.UTF8.GetDecoder();
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char[] chars = new char[decoder.GetCharCount(buffer, 0, (int)length)];
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decoder.GetChars(buffer, 0, (int)length, chars, 0);
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return new string(chars);
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}
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public static void marshal_string(Stream stream, string x){
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marshal_int(stream, x.Length);
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char[] c = x.ToCharArray();
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Encoder encoder = Encoding.UTF8.GetEncoder();
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byte[] bytes = new byte[encoder.GetByteCount(c, 0, c.Length, true)];
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encoder.GetBytes(c, 0, c.Length, bytes, 0, true);
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stream.Write(bytes, 0, bytes.Length);
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}
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}
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public class Messages
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{
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public enum tag
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{
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Print = 0, Load = 1, HttpGet = 12, HttpPut = 13, Prompt = 3, Exit = 4,
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Error = 14, OK = 5, Failed = 6, Chunk = 7, End = 8, Command = 9, Response = 10,
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Blob = 11, Debug = 15, PrintStderr = 16
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};
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public static tag unmarshal_tag(Stream stream)
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{
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int x = Types.unmarshal_int(stream);
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return (tag)x;
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}
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public static void marshal_tag(Stream stream, tag tag)
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{
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Types.marshal_int(stream, (int)tag);
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}
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public static void marshal_response(Stream stream, tag t)
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{
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Types.marshal_int(stream, 4 + 4);
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marshal_tag(stream, tag.Response);
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marshal_tag(stream, t);
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}
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public static void protocol_failure(string msg, tag t, thinCLIProtocol tCLIprotocol)
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{
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tCLIprotocol.dGlobalError("Protocol failure: Reading " + msg + ": unexpected tag: " + t);
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tCLIprotocol.dExit(1);
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}
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public static void load(Stream stream, string filename, thinCLIProtocol tCLIprotocol)
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{
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try
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{
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using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
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{
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FileInfo fi = new FileInfo(filename);
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// Immediately report our success in opening the file
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marshal_response(stream, tag.OK);
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// The server doesn't like multiple chunks but this is fine for
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// Zurich/Geneva imports
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Types.marshal_int(stream, 4 + 4 + 4);
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marshal_tag(stream, tag.Blob);
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marshal_tag(stream, tag.Chunk);
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Types.marshal_int32(stream, (uint)fi.Length);
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byte[] block = new byte[tCLIprotocol.conf.block_size];
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while (true)
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{
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int n = fs.Read(block, 0, block.Length);
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if (n == 0)
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{
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Types.marshal_int(stream, 4 + 4);
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marshal_tag(stream, tag.Blob);
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marshal_tag(stream, tag.End);
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break;
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}
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stream.Write(block, 0, n);
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tCLIprotocol.dProgress(n);
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}
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}
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}
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catch (DirectoryNotFoundException)
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{
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marshal_response(stream, tag.Failed);
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}
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catch (FileNotFoundException)
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{
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marshal_response(stream, tag.Failed);
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}
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}
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public static void http_put(Stream stream, string filename, Uri uri, thinCLIProtocol tCLIprotocol)
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{
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try
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{
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using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
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{
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using (Stream http = HTTP.doRPC("PUT", uri, tCLIprotocol))
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{
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if (http == null)
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{
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marshal_response(stream, tag.Failed);
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return;
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}
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byte[] block = new byte[tCLIprotocol.conf.block_size];
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while (true)
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{
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int n = fs.Read(block, 0, block.Length);
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if (n == 0) break;
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http.Write(block, 0, n);
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}
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marshal_response(stream, tag.OK);
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}
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}
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}
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catch (FileNotFoundException)
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{
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tCLIprotocol.dGlobalError("File not found");
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marshal_response(stream, tag.Failed);
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}
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catch (Exception e)
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{
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tCLIprotocol.dGlobalError(string.Format("Received exception: {0}", e.Message));
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marshal_response(stream, tag.Failed);
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}
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}
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public static void http_get(Stream stream, string filename, Uri uri, thinCLIProtocol tCLIprotocol)
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{
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try
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{
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if (File.Exists(filename))
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throw new Exception(string.Format("The file '{0}' already exists", filename));
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using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write))
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{
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using (Stream http = HTTP.doRPC("GET", uri, tCLIprotocol))
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{
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if (http == null)
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{
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tCLIprotocol.dGlobalError("Server rejected request");
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marshal_response(stream, tag.Failed);
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return;
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}
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byte[] block = new byte[tCLIprotocol.conf.block_size];
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while (true)
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{
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int n = http.Read(block, 0, block.Length);
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if (n == 0) break;
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fs.Write(block, 0, n);
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}
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marshal_response(stream, tag.OK);
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}
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}
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}
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catch (Exception e)
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{
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tCLIprotocol.dGlobalError("Received exception: " + e.Message);
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tCLIprotocol.dGlobalError("Unable to write output file: " + filename);
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marshal_response(stream, tag.Failed);
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}
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}
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public static void version_handshake(Stream stream, thinCLIProtocol tCLIprotocol)
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{
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/* Check for the initial magic string */
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|||
|
byte[] magic = Types.unmarshal_n(stream, (uint)tCLIprotocol.magic_string.Length);
|
|||
|
for (int i = 0; i < tCLIprotocol.magic_string.Length; i++)
|
|||
|
{
|
|||
|
if (magic[i] != tCLIprotocol.magic_string[i])
|
|||
|
{
|
|||
|
tCLIprotocol.dGlobalError("Failed to find a server on " + tCLIprotocol.conf.hostname + ":" + tCLIprotocol.conf.port);
|
|||
|
tCLIprotocol.dGlobalUsage();
|
|||
|
tCLIprotocol.dExit(1);
|
|||
|
}
|
|||
|
}
|
|||
|
/* Read the remote version numbers */
|
|||
|
int remote_major = Types.unmarshal_int(stream);
|
|||
|
int remote_minor = Types.unmarshal_int(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Remote host has version " + remote_major + "." + remote_minor, tCLIprotocol);
|
|||
|
tCLIprotocol.dGlobalDebug("Client has version " + tCLIprotocol.major + "." + tCLIprotocol.minor, tCLIprotocol);
|
|||
|
if (tCLIprotocol.major != remote_major)
|
|||
|
{
|
|||
|
tCLIprotocol.dGlobalError("Protocol version mismatch talking to server on " + tCLIprotocol.conf.hostname + ":" + tCLIprotocol.conf.port);
|
|||
|
tCLIprotocol.dGlobalUsage();
|
|||
|
tCLIprotocol.dExit(1);
|
|||
|
}
|
|||
|
/* Tell the server our version numbers */
|
|||
|
for (int i = 0; i < tCLIprotocol.magic_string.Length; i++)
|
|||
|
{
|
|||
|
stream.WriteByte((byte)tCLIprotocol.magic_string[i]);
|
|||
|
}
|
|||
|
Types.marshal_int(stream, tCLIprotocol.major);
|
|||
|
Types.marshal_int(stream, tCLIprotocol.minor);
|
|||
|
}
|
|||
|
|
|||
|
public static void performCommand(string Body, thinCLIProtocol tCLIprotocol)
|
|||
|
{
|
|||
|
string body = Body;
|
|||
|
body += "username=" + tCLIprotocol.conf.username + "\n";
|
|||
|
body += "password=" + tCLIprotocol.conf.password + "\n";
|
|||
|
if (body.Length != 0)
|
|||
|
{
|
|||
|
body = body.Substring(0, body.Length - 1); // strip last "\n"
|
|||
|
}
|
|||
|
|
|||
|
string header = "POST /cli HTTP/1.0\r\n";
|
|||
|
string content_length = "content-length: " + Encoding.UTF8.GetBytes(body).Length + "\r\n";
|
|||
|
string tosend = header + content_length + "\r\n" + body;
|
|||
|
|
|||
|
try
|
|||
|
{
|
|||
|
Stream stream = Transport.connect(tCLIprotocol, tCLIprotocol.conf.hostname, tCLIprotocol.conf.port);
|
|||
|
if (stream == null)
|
|||
|
{
|
|||
|
// The SSL functions already tell us what happened
|
|||
|
tCLIprotocol.dExit(1);
|
|||
|
}
|
|||
|
byte[] message = Encoding.UTF8.GetBytes(tosend);
|
|||
|
stream.Write(message, 0, message.Length);
|
|||
|
stream.Flush();
|
|||
|
Messages.version_handshake(stream, tCLIprotocol);
|
|||
|
interpreter(stream, tCLIprotocol);
|
|||
|
}
|
|||
|
catch (SocketException)
|
|||
|
{
|
|||
|
tCLIprotocol.dGlobalError("Connection to " + tCLIprotocol.conf.hostname + ":" + tCLIprotocol.conf.port + " refused.");
|
|||
|
tCLIprotocol.dExit(1);
|
|||
|
}
|
|||
|
catch (Exception e)
|
|||
|
{
|
|||
|
if (tCLIprotocol.conf.debug) throw e;
|
|||
|
tCLIprotocol.dGlobalError("Caught exception: " + e.Message);
|
|||
|
tCLIprotocol.dExit(1);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
public static void interpreter(Stream stream, thinCLIProtocol tCLIprotocol)
|
|||
|
{
|
|||
|
string filename = "";
|
|||
|
string path = "";
|
|||
|
string msg = "";
|
|||
|
while (!tCLIprotocol.dropOut)
|
|||
|
{
|
|||
|
Types.unmarshal_int32(stream); // total message length (unused here)
|
|||
|
Messages.tag t = Messages.unmarshal_tag(stream);
|
|||
|
switch (t)
|
|||
|
{
|
|||
|
case Messages.tag.Command:
|
|||
|
t = Messages.unmarshal_tag(stream);
|
|||
|
switch (t)
|
|||
|
{
|
|||
|
case Messages.tag.Print:
|
|||
|
msg = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Print: " + msg, tCLIprotocol);
|
|||
|
tCLIprotocol.dConsoleWriteLine(msg);
|
|||
|
break;
|
|||
|
case Messages.tag.PrintStderr:
|
|||
|
msg = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: PrintStderr: " + msg, tCLIprotocol);
|
|||
|
tCLIprotocol.dConsoleWriteLine(msg);
|
|||
|
break;
|
|||
|
case Messages.tag.Debug:
|
|||
|
msg = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Debug: " + msg, tCLIprotocol);
|
|||
|
tCLIprotocol.dConsoleWriteLine(msg);
|
|||
|
break;
|
|||
|
case Messages.tag.Exit:
|
|||
|
int code = Types.unmarshal_int(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Command Exit " + code, tCLIprotocol);
|
|||
|
tCLIprotocol.dExit(code);
|
|||
|
break;
|
|||
|
case Messages.tag.Error:
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Command Error", tCLIprotocol);
|
|||
|
string err_code = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dConsoleWriteLine("Error code: " + err_code);
|
|||
|
tCLIprotocol.dConsoleWrite("Error params: ");
|
|||
|
int length = Types.unmarshal_int(stream);
|
|||
|
for (int i = 0; i < length; i++)
|
|||
|
{
|
|||
|
string param = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dConsoleWrite(param);
|
|||
|
if (i != (length - 1)) tCLIprotocol.dConsoleWrite(", ");
|
|||
|
}
|
|||
|
tCLIprotocol.dConsoleWriteLine("");
|
|||
|
break;
|
|||
|
case Messages.tag.Prompt:
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Command Prompt", tCLIprotocol);
|
|||
|
string response = tCLIprotocol.dConsoleReadLine();
|
|||
|
tCLIprotocol.dConsoleWriteLine("Read "+response);
|
|||
|
/* NB, 4+4+4 here for the blob, chunk and string length, put in by the marshal_string
|
|||
|
function. A franken-marshal. */
|
|||
|
Types.marshal_int(stream, 4 + 4 + 4); // length
|
|||
|
Messages.marshal_tag(stream, Messages.tag.Blob);
|
|||
|
Messages.marshal_tag(stream, Messages.tag.Chunk);
|
|||
|
Types.marshal_string(stream, response);
|
|||
|
Types.marshal_int(stream, 4 + 4); // length
|
|||
|
Messages.marshal_tag(stream, Messages.tag.Blob);
|
|||
|
Messages.marshal_tag(stream, Messages.tag.End);
|
|||
|
break;
|
|||
|
case Messages.tag.Load:
|
|||
|
filename = Types.unmarshal_string(stream);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: Load " + filename, tCLIprotocol);
|
|||
|
Messages.load(stream, filename, tCLIprotocol);
|
|||
|
break;
|
|||
|
case Messages.tag.HttpPut:
|
|||
|
filename = Types.unmarshal_string(stream);
|
|||
|
path = Types.unmarshal_string(stream);
|
|||
|
Uri uri = ParseUri(path, tCLIprotocol);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: HttpPut " + filename + " -> " + uri, tCLIprotocol);
|
|||
|
Messages.http_put(stream, filename, uri, tCLIprotocol);
|
|||
|
break;
|
|||
|
case Messages.tag.HttpGet:
|
|||
|
filename = Types.unmarshal_string(stream);
|
|||
|
path = Types.unmarshal_string(stream);
|
|||
|
uri = ParseUri(path, tCLIprotocol);
|
|||
|
tCLIprotocol.dGlobalDebug("Read: HttpGet " + filename + " -> " + uri, tCLIprotocol);
|
|||
|
Messages.http_get(stream, filename, uri, tCLIprotocol);
|
|||
|
break;
|
|||
|
default:
|
|||
|
Messages.protocol_failure("Command", t, tCLIprotocol);
|
|||
|
break;
|
|||
|
}
|
|||
|
break;
|
|||
|
default:
|
|||
|
Messages.protocol_failure("Message", t, tCLIprotocol);
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
private static Uri ParseUri(string path, thinCLIProtocol tcli)
|
|||
|
{
|
|||
|
// The server sometimes sends us a relative path (e.g. for VM import)
|
|||
|
// and sometimes an absolute URI (https://host/path). Construct the absolute URI
|
|||
|
// based on what we're given. The same hack exists in the server code...
|
|||
|
// See CA-10942.
|
|||
|
if (path.StartsWith("/"))
|
|||
|
{
|
|||
|
string[] bits = path.Split('?');
|
|||
|
UriBuilder uriBuilder = new UriBuilder();
|
|||
|
uriBuilder.Scheme = "https";
|
|||
|
uriBuilder.Host = tcli.conf.hostname;
|
|||
|
uriBuilder.Port = tcli.conf.port;
|
|||
|
uriBuilder.Path = bits[0];
|
|||
|
if (bits.Length > 1)
|
|||
|
uriBuilder.Query = bits[1];
|
|||
|
return uriBuilder.Uri;
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
return new Uri(path);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
}
|