I use Chilkat SSH to start a remote shell by calling ssh.SendReqShell and then run a command by calling ssh.ChannelSendString. I call ChannelReadAndPoll to receive the output, but the 2 seesions return different outputs. why?
Am I missing something?
Please see the pic at the url:
https://imgur.com/a/Sttg3please see the code below.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
namespace To_Cisco_device_through_Linux_jump
{
class Program
{
static string JUMPER = "192.168.2.2";
static int PORT = 22;
static string username = "tommy";
static string passwd = "f0";
static void SendCmdToRouter(string router, List<string> cmdlist)
{
Chilkat.Ssh ssh_jumper = new Chilkat.Ssh();
// Any string automatically begins a fully-functional 30-day trial.
bool success = ssh_jumper.UnlockComponent("30-day trial");
if (success != true) {
Console.WriteLine(ssh_jumper.LastErrorText);
Console.ReadKey();
return;
}
// Connect to an SSH server:
// JUMPER may be an IP address or JUMPER:
success = ssh_jumper.Connect(JUMPER, PORT);
if (success != true) {
Console.WriteLine(ssh_jumper.LastErrorText);
Console.ReadKey();
return;
}
// Wait a max of 10 seconds when reading responses..
ssh_jumper.IdleTimeoutMs = 10000;
// Authenticate using login/password:
success = ssh_jumper.AuthenticatePw(username, passwd);
if (success != true) {
Console.WriteLine(ssh_jumper.LastErrorText);
Console.ReadKey();
return;
}
/*INITIATE SECOND SSH CONNECTION*/
Chilkat.Ssh ssh_router = new Chilkat.Ssh();
success = ssh_router.ConnectThroughSsh(ssh_jumper, router, 22);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
ssh_router.IdleTimeoutMs = 10000;
success = ssh_router.AuthenticatePw(username, passwd);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
} else{
Console.WriteLine("router: " + router + " connected!");
Thread.Sleep(1500);}
// Open a session channel. (It is possible to have multiple
// session channels open simultaneously.)
int channelNum_router;
channelNum_router = ssh_router.OpenSessionChannel();
if (channelNum_router < 0) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
// Some SSH servers require a pseudo-terminal
// If so, include the call to SendReqPty. If not, then
// comment out the call to SendReqPty.
// Note: The 2nd argument of SendReqPty is the terminal type,
// which should be something like "xterm", "vt100", "dumb", etc.
// A "dumb" terminal is one that cannot process escape sequences.
// Smart terminals, such as "xterm", "vt100", etc. process
// escape sequences. If you select a type of smart terminal,
// your application will receive these escape sequences
// included in the command's output. Use "dumb" if you do not
// want to receive escape sequences. (Assuming your SSH
// server recognizes "dumb" as a standard dumb terminal.)
// Use 0 for pixWidth and pixHeight when the dimensions
// are set in number-of-chars.
success = ssh_router.SendReqPty(channelNum_router, "dumb", 120, 40, 0, 0);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
// Start a shell on the channel:
success = ssh_router.SendReqShell(channelNum_router);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
// Start mutil commands in the remote shell.
foreach (string myStringList in cmdlist) {
//Console.WriteLine(myStringList);
success = ssh_router.ChannelSendString(channelNum_router, myStringList, "ansi");
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
//Thread.Sleep(1000);
//last cmd
if (cmdlist.Last() == myStringList) {
// Send an EOF. This tells the server that no more data will
// be sent on this channel. The channel remains open, and
// the SSH client may still receive output on this channel.
success = ssh_router.ChannelSendEof(channelNum_router);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
Console.WriteLine("sendEOF");
}
//prevent an infinite wait if the matchPattern never arrives.
/*ssh_router.ReadTimeoutMs = 5000;
// Retrieve the output.
// success = ssh_router.ChannelReceiveUntilMatch(channelNum_router, "hellocat", "ansi", true);
// if (success != true) {
// Console.WriteLine(ssh_router.LastErrorText);
// Console.ReadKey();
// return;
// }*/
int n = ssh_router.ChannelReadAndPoll(channelNum_router, 2000);
if (n < 0) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
//last cmd
if (cmdlist.Last() == myStringList) {
// Close the channel:
success = ssh_router.ChannelSendClose(channelNum_router);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
Console.WriteLine("channelclose");
// Perhaps we did not receive all of the commands output.
// To make sure, call ChannelReceiveToClose to accumulate any remaining
// output until the server's corresponding "channel close" is received.
success = ssh_router.ChannelReceiveToClose(channelNum_router);
if (success != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
}
//pickup the accumulated output of the command:
string cmdOutput = ssh_router.GetReceivedText(channelNum_router, "ansi");
if (ssh_router.LastMethodSuccess != true) {
Console.WriteLine(ssh_router.LastErrorText);
Console.ReadKey();
return;
}
Console.WriteLine(cmdOutput);
//Console.WriteLine(cmdOutput.Replace("echo hellocat", "").Replace("hellocat", ""));
}
// Display the remote shell's command output:
//Console.WriteLine(cmdOutput);
Console.ReadKey();
// Disconnect
ssh_router.Disconnect();
ssh_jumper.Disconnect();
}
static List<string> ReadConfig()
{
string line = null;
//string cmds = null;
List<string> myStringLists = new List<string>();
System.IO.StreamReader file = new System.IO.StreamReader(@"3315_sap.txt");
while ((line = file.ReadLine()) != null) {
//System.Console.WriteLine(line);
if (!line.StartsWith("#") && line.Length > 0) {
myStringLists.Add(line.TrimEnd('\r', '\n', ' ') + "\r\n");
}
}
//cmds.Remove(cmds.Length - 2, 2);
file.Close();
return myStringLists;
}
static void Main(string[] args)
{
// Important: It is helpful to send the contents of the
// ssh.LastErrorText property when requesting support.
Console.Write("請輸入router名稱: ");
string routername = Console.ReadLine();
if (routername != "")
{
List<string> cmdlist = ReadConfig();
Console.WriteLine(cmdlist.Count.ToString());
SendCmdToRouter(routername, cmdlist);
}
}
}
}
