Lua

Send a 16-bit Integer over a Socket

Demonstrates Socket.SendInt16, which sends the low 16 bits of a value as a two-byte integer in the selected byte order.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

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Lua

local chilkat = require("chilkat")

local socket = chilkat.Socket.new()

-- Connect to the server using TLS.
local bTls = true
local maxWaitMs = 5000
local success = socket:connect("example.com", 5000, bTls, maxWaitMs)
if not success then
    print(socket.last_error_text)
    return
end

-- Send the low 16 bits of the value as a two-byte integer.  Use true for network byte order
-- (big-endian) or false for little-endian.
local bBigEndian = true
success = socket:send_int16(1024, bBigEndian)
if not success then
    print(socket.last_error_text)
    return
end

print("16-bit integer sent.")