ToolipsUDP provides high-level toolips-style functionality to UDP networking projects. This functionality is facilitated via the UDPServer and UDPConnection types.

Whereas a Toolips WebServer typically comes with a router, the UDPServer takes a Function directly and provides this function with a UDPConnection. To create a UDP server, we provide a connection handler function. Use the UDPServer constructor with a do block to specify the behavior when a connection is received. Here's an example:

using ToolipsUDP

# Define a connection handler function
function my_connection_handler(c::UDPConnection)
    println("Received packet: ", c.packet)
    println("From IP: ", c.ip)
    println("On port: ", c.port)
end

# Create and start a UDPServer with the connection handler using do block
UDPServer("127.0.0.1", 2000) do c::UDPConnection
    my_connection_handler(c)
end

A UDPServer may also be constructed without a handler Function, and this might be ideal for sending data.

ToolipsUDP provides convenient functions for sending data to UDP servers. Packets may be sent from

• A UDPServer
• A UDPConnection
• or just sent once with a quick socket binding.

The dispatches for these are:

• send(c::UDPServer, data::String, to::String = "127.0.0.1", port::Int64 = 2000)
• send(c::UDPConnection, data::String, to::String = "127.0.0.1", port::Int64 = 2000)
• and send(data::String, to::String = "127.0.0.1", port::Int64 = 2000; from::Int64 = port - 5) respectively.

Like toolips, ToolipsUDP provides an extensible server infastructure which allows for the addition of new, reproducible features to a server. In ToolipsUDP, these extensions are facilitated using multiple dispatch, the UDPExtension type, and the functions serve and onstart. To add an extension, first import one of these functions. For this example, we will import both.

import ToolipsUDP: serve, onstart

The serve function is called on our UDPConnection each time we recieve an incoming packet. The onstart function is called on our Connection data on start.

using ToolipsUDP
import ToolipsUDP: serve, onstart

onstart(data::Dict{Symbol, Any}, ue::UDPExtension{:loaddata}) = push!(data, :mydata => "hello world!")

serve(c::UDPConnection, ue::UDPExtension{:printdata}) = println(c[:mydata])