# UDPConnection

Provides a network connection over UDP, with verification of packet support via
libsodium (optional). Implemented in C++ (up to C++11 standard), but is
available via a C api, which should facilitate creating bindings for other
programming languages if needed.

~~This library is still a work in progress, so api breaking changes may happen
in the future.~~  
This library is usable. Try testing it out using the `NetworkTest` binary which
is built when Debug builds are enabled (the default) with CMake.

    $ ./NetworkTest
    [-c | -s] - client or server (default server)
    -ll <addr> - listen addr
    -lp <port> - listen port
    -cl <addr> - connection addr (client only)
    -clh <hostname> - connection hostname (client only)
    -cp <port> - connection port (client only)
    -t <tick_count>
    -n - do not add payload to packets
    -l (silent|error|warning|info|verbose|debug) - log level, default debug
    -e - enable receiving events
    -ls - enable libsodium
    -ck <pubkey_file> - add pubkey to whitelist
    -sk <pubkey> <seckey> - start with pub/sec key pair
    -p <"fallback" or "strict"> - set auth policy
    --hostname <hostname> - dont run test, just lookup hostname

A typical test can be done with the following parameters:

Server:

    ./NetworkTest -s -ll ::1 -lp 9000 -t 50 -e

Client:

    ./NetworkTest -c -ll ::1 -lp 9001 -cl ::1 -cp 9000 -t 40 -e

`NetworkTest` gracefully shuts down on SIGINT (Ctrl-C).

The source of `NetworkTest` can be found in `src/test/UDPC_NetworkTest.c`.

## Documentation

[See the gh-pages generated Doxygen documentation here.](https://stephen-seo.github.io/UDPConnection/)

[Alternatively, see the generated Doxygen documentation on my website.](https://seodisparate.com/udpc_docs)

## Compiling

### Release builds

    mkdir buildRelease
    cd buildRelease
    cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_SHARED_LIBS=True ..
    make
    make DESTDIR=install_destination install

### Debug builds

    mkdir buildDebug
    cd buildDebug
    cmake -DCMAKE_BUILD_TYPE=Debug ..
    make

## Usage

The program in `src/test/UDPC_NetworkTest.c` is used for testing UDPConnection
and is also an example of using the library in a C program.

## Debug Builds

NetworkTest only builds when CMAKE\_BUILD\_TYPE is Debug (default).

UnitTest only builds in Debug mode and if GTest (a unit testing framework) is
available.

# Links
https://github.com/Stephen-Seo/UDPConnection  
https://git.seodisparate.com/stephenseo/UDPConnection

# Other Notes

Inspired by [a series of blog posts about networking for games.](https://gafferongames.com/categories/game-networking/)