PowerShell

Socket Send/Receive 16-bit Integers

Demonstrates sending and receiving 16-bit integers over a socket connection using either big-endian or little-endian byte ordering. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$sock = New-Object Chilkat.Socket

# --------------------------------------------------------------------
# This example uses the public TCP echo service at https://tcpbin.com/
# --------------------------------------------------------------------

$useTls = $false
$port = 4242
$maxWaitMs = 5000
$success = $sock.Connect("tcpbin.com",$port,$useTls,$maxWaitMs)
if ($success -eq $false) {
    $($sock.LastErrorText)
    exit
}

# Wait a max of 2 seconds for a response..
$sock.MaxReadIdleMs = 2000

# Send a 16-bit integer using big-endian byte ordering (also called network byte order)
# 12022 decimal = 2EF6 hex
$value = 12022
$bigEndian = $true
$sock.SendInt16($value,$bigEndian)
# Send it again, because we'll read it two different ways..
$sock.SendInt16($value,$bigEndian)

# The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
$sock.SendByte(10)

# Let's see hex values of the 2 bytes sent in network byte order (big-endian)
# (The echo server sends back exactly the bytes received.)
$hexStr = $sock.ReceiveNBytesENC(2,"hex")

# In the big-ending byte order, the byte order is most significant byte to least significant,
# therefore we should see the bytes in the order 0x2E 0xF6.
$("Expecting big-endian 2EF6")
$($hexStr)

# Let's read directly to an integer..
$success = $sock.ReceiveInt16($bigEndian,$true)
$("Expecting 12022")
$("Received: " + $sock.ReceivedInt)

# Consume the LF that gets echoed back..
$sock.ReceiveByte($true)

# --------------------------------------------------------------------
# Let's do the same thing, but with little-endian byte ordering.

$("----")

# 12022 decimal = 2EF6 hex, but little-endian byte ordering will send the bytes in the order 0xF6 0x2E
$value = 12022
$bigEndian = $false
$sock.SendInt16($value,$bigEndian)
$sock.SendInt16($value,$bigEndian)
$sock.SendByte(10)

$hexStr = $sock.ReceiveNBytesENC(2,"hex")

$("Expecting little-endian F62E")
$($hexStr)

$success = $sock.ReceiveInt16($bigEndian,$true)
$("Expecting 12022")
$("Received: " + $sock.ReceivedInt)

# Consume the LF that gets echoed back..
$sock.ReceiveByte($true)

$sock.Close(1000)

# Output:

# Expecting big-endian 2EF6
# 2EF6
# Expecting 12022
# Received: 12022
# ----
# Expecting little-endian F62E
# F62E
# Expecting 12022
# Received: 12022