functions/Test-DbaEndpoint.ps1

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#ValidationTags#Messaging,FlowControl,Pipeline,CodeStyle#
function Test-DbaEndpoint {
<#
    .SYNOPSIS
        Tests connectivity for TCP enabled endpoints.
 
    .DESCRIPTION
        Tests connectivity for TCP enabled endpoints.
 
        Note that if an endpoint does not have a tcp listener port, it will be skipped.
 
    .PARAMETER SqlInstance
        The target SQL Server instance or instances. This can be a collection and receive pipeline input to allow the function
        to be executed against multiple SQL Server instances.
 
    .PARAMETER SqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER Endpoint
        Return only specific endpoint or endpoints
 
    .PARAMETER InputObject
        Allows piping from Get-DbaEndpoint
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .NOTES
        Tags: Endpoint
        Author: Chrissy LeMaire (@cl), netnerds.net
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .LINK
        https://dbatools.io/Test-DbaEndpoint
 
    .EXAMPLE
        PS C:\> Test-DbaEndpoint -SqlInstance localhost
 
        Tests all endpoints on the local default SQL Server instance.
 
    .EXAMPLE
        PS C:\> Get-DbaEndpoint -SqlInstance localhost, sql2016 -Endpoint Mirror | Test-DbaEndpoint
 
        Tests all endpoints named Mirroring on sql2016 and localhost.
 
    .EXAMPLE
        PS C:\> Test-DbaEndpoint -SqlInstance localhost, sql2016 -Endpoint Mirror
 
        Tests all endpoints named Mirroring on sql2016 and localhost.
 
    .EXAMPLE
        PS C:\> Test-DbaEndpoint -SqlInstance localhost -Verbose
 
        Tests all endpoints on the local default SQL Server instance.
        See all endpoints that were skipped due to not having a tcp listener port.
 
#>

    [CmdletBinding()]
    param (
        [DbaInstanceParameter[]]$SqlInstance,
        [PSCredential]$SqlCredential,
        [string[]]$Endpoint,
        [parameter(ValueFromPipeline)]
        [Microsoft.SqlServer.Management.Smo.Endpoint[]]$InputObject,
        [switch]$EnableException
    )
    process {
        foreach ($instance in $SqlInstance) {
            $InputObject += Get-DbaEndpoint -SqlInstance $instance -SqlCredential $SqlCredential #-Endpoint $Endpoint
        }

        foreach ($end in $InputObject) {
            if (-not $end.Protocol.Tcp.ListenerPort) {
                Write-Message -Level Verbose -Message "$end on $($end.Parent) does not have a tcp listener port"
            }
            else {

                try {
                    $tcp = New-Object System.Net.Sockets.TcpClient
                    $tcp.Connect($end.ComputerName, $end.Protocol.Tcp.ListenerPort)
                    $tcp.Close()
                    $tcp.Dispose()
                    $connect = "Success"
                }
                catch {
                    $connect = $_
                }

                try {
                    $ssl = $end.Protocol.Tcp.SslPort
                    if ($ssl) {
                        $tcp = New-Object System.Net.Sockets.TcpClient
                        $tcp.Connect($end.ComputerName, $ssl)
                        $tcp.Close()
                        $tcp.Dispose()
                        $sslconnect = "Success"
                    }
                    else {
                        $sslconnect = "None"
                    }
                }
                catch {
                    $sslconnect = $_
                }

                [pscustomobject]@{
                    ComputerName = $end.ComputerName
                    InstanceName = $end.InstanceName
                    SqlInstance  = $end.SqlInstance
                    Endpoint     = $end.Name
                    Port         = $end.Protocol.Tcp.ListenerPort
                    Connection   = $connect
                    SslConnection = $sslconnect
                }
            }
        }
    }
}