Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Xojo Plugin Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text

HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Xojo Plugin) TCP Socket through SSH Tunnel (Port Forwarding)

Demonstrates using Chilkat Socket to communicate to a TCP service through an SSH tunnel. This example will connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily a recommended means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305). The intent of this example is to show how TCP communications can occur through an SSH tunnel.

Chilkat Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Dim tunnel As New Chilkat.Socket

Dim sshHostname As String
sshHostname = "www.my-ssh-server.com"
Dim sshPort As Int32
sshPort = 22

// Connect to an SSH server and establish the SSH tunnel:
Dim success As Boolean
success = tunnel.SshOpenTunnel(sshHostname,sshPort)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Authenticate with the SSH server via a login/password
// or with a public key.
// This example demonstrates SSH password authentication.
success = tunnel.SshAuthenticatePw("mySshLogin","mySshPassword")
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// OK, the SSH tunnel is setup.  Now open a channel within the tunnel.
// Once the channel is obtained, the Socket API may
// be used exactly the same as usual, except all communications
// are sent through the channel in the SSH tunnel.
// Any number of channels may be created from the same SSH tunnel.
// Multiple channels may coexist at the same time.

// Connect to an NIST time server and read the current date/time
Dim channel As Chilkat.Socket
Dim maxWaitMs As Int32
maxWaitMs = 4000
Dim useTls As Boolean
useTls = False
channel = tunnel.SshOpenChannel("time-c.nist.gov",37,useTls,maxWaitMs)
If (tunnel.LastMethodSuccess = False) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// The time server will send a big-endian 32-bit integer representing
// the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
// The ReceiveInt32 method will receive a 4-byte integer, but returns
// True or False to indicate success.  If successful, the integer
// is obtained via the ReceivedInt property.
Dim bigEndian As Boolean
bigEndian = True
success = channel.ReceiveInt32(bigEndian)
If (success <> True) Then
    System.DebugLog(channel.LastErrorText)

    Return
End If

Dim dt As New Chilkat.CkDateTime
success = dt.SetFromNtpTime(channel.ReceivedInt)

// Show the current local date/time
Dim bLocalTime As Boolean
bLocalTime = True
System.DebugLog("Current local date/time: " + dt.GetAsRfc822(bLocalTime))

// Close the SSH channel.
success = channel.Close(maxWaitMs)
If (success <> True) Then
    System.DebugLog(channel.LastErrorText)

    Return
End If

// It is possible to create a new channel from the existing SSH tunnel for the next connection:
// Any number of channels may be created from the same SSH tunnel.
// Multiple channels may coexist at the same time.
channel = tunnel.SshOpenChannel("time-a.nist.gov",37,useTls,maxWaitMs)
If (tunnel.LastMethodSuccess = False) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Review the LastErrorText to see that the connection was made via the SSH tunnel:
System.DebugLog(tunnel.LastErrorText)

// Close the connection to time-a.nist.gov.  This is actually closing our channel
// within the SSH tunnel, but keeps the tunnel open for the next port-forwarded connection.
success = channel.Close(maxWaitMs)
If (success <> True) Then
    System.DebugLog(channel.LastErrorText)

    Return
End If

// Finally, close the SSH tunnel.
success = tunnel.SshCloseTunnel()
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

System.DebugLog("TCP SSH tunneling example completed.")

 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.