Linphone Call Block is a PowerShell script designed to block unwanted calls on Linphone App (Windows).

This script cannot intercept calls, meaning that you will likely hear the bell ring before the call is automatically blocked.

• Anyone included in this list will be blocked.
• The blacklist takes priority over everything else.
• This list is represented as variable $blacklist.

• Anyone included in this list will not be blocked.
• This list is represented as variable $whitelist.

• Anyone who is in your Linphone contact list (address book) will not be blocked.

• By default, Linphone Call Block will block unknown callers.
• Variable $block_unknown_caller, which is either $true or $false, lets you decide whether to block calls from unknown adresses or not.

When you execute the Linphone binary with --verbose option through Command Prompt or PowerShell, you will be able to see what is going on behind the Linphone app. This stream of outputs normally cannot be piped, but there is a workaround for that. Here is a part of the script that makes the workaround possible:

$binary_path = 'C:\Program Files\Linphone\bin\linphone.exe'

$linphone_app = Start-Job -ScriptBlock {
    param($binary)
    powershell.exe -Command "& '$binary' --verbose" *>&1
} -ArgumentList $binary_path

While ($true) {
    $linphone_stream = $linphone_app | Receive-Job
    EvaluateStream($linphone_stream)
    Start-Sleep -Milliseconds 500
}

This way, you will be able to "pipe" the console window output.
However, there is a limitation; since the above reads lines off from the console window, any output longer than the console window width will have a line break.

You can evaluate and extract meaningful parts from the output stream using regular expressions like the following:

Switch -Regex ($s|Out-String) {
    $regex_A {Function_A($matches)}
    $regex_B {Function_B($matches)}
    $regex_C {Function_C($matches)}
}

$matches is an automatic variable. Read this for details.

Currently, Linphone Call Block uses Linphone Command Line to deny calls. Although this method is most straightforward, it takes significant time (>1sec).

The best method would be Linphone app itself having a call block feature.