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https://github.com/membraneframework/ex_libnice
Libnice-based Interactive Connectivity Establishment (ICE) protocol support for Elixir
https://github.com/membraneframework/ex_libnice
elixir ice libnice stun turn
Last synced: about 2 months ago
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Libnice-based Interactive Connectivity Establishment (ICE) protocol support for Elixir
- Host: GitHub
- URL: https://github.com/membraneframework/ex_libnice
- Owner: membraneframework
- License: apache-2.0
- Created: 2020-09-24T10:13:14.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2023-11-17T14:49:34.000Z (about 1 year ago)
- Last Synced: 2024-10-29T08:42:15.053Z (about 2 months ago)
- Topics: elixir, ice, libnice, stun, turn
- Language: Elixir
- Homepage:
- Size: 77.1 KB
- Stars: 6
- Watchers: 4
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# ExLibnice
[](https://hex.pm/packages/ex_libnice)
[](https://hexdocs.pm/ex_libnice/)
[](https://circleci.com/gh/membraneframework/ex_libnice)
Libnice-based Interactive Connectivity Establishment (ICE) protocol support for Elixir.
It is a part of [Membrane Multimedia Framework](https://membraneframework.org).
## Installation
First, install [libnice] on your system:
### macOS
```bash
brew install libnice
```
### Ubuntu
```bash
sudo apt-get install libnice-dev
```
The package can be installed by adding `ex_libnice` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:ex_libnice, "~> 0.8.0"}
]
end
```
## Usage
Basically this library works similarly to [libnice].
`ExLibnice` can work both as CNode and as NIF.
By default `CNode` implementation is used however, user can change it by passing proper option while starting `ExLibnice` (see below) or by `config.exs`:
```elixir
config :ex_libnice, impl: :NIF
```
User can also choose whether to resolve mDNS addresses or not:
```elixir
config :ex_libnice, mdns: false
```
Example flow can look in the following way (this is not complete i.e. runnable example).
Listed functions must be invoked on both peers.
```elixir
# Init ExLibnice
{:ok, pid} =
ExLibnice.start_link(
impl: NIF,
parent: self(),
stun_servers: [
%{server_addr: {64, 233, 161, 127}, server_port: 19_302},
%{server_addr: "stun1.l.google.com", server_port: 19_302}
],
controlling_mode: true,
port_range: 0..0
)
# Add stream, get local credentials
{:ok, stream_id} = ExLibnice.add_stream(ice, 1, "audio")
{:ok, credentials} = ExLibnice.get_local_credentials(ice, stream_id)
# Send local credentials to the remote peer
:socket.send(peer_socket, credentials)
```
```elixir
# Receive remote credentials and set them on ExLibnice
{:ok, credentials} = :socket.recv(peer_socket)
:ok = ExLibnice.set_remote_credentials(ice, peer_credentials, stream_id)
# Start gathering candidates
:ok = ExLibnice.gather_candidates(ice, stream_id)
```
```elixir
# Now we should prepare for receiving messages in form of `{:new_candidate_full, candidate}`
# and send them to the remote peer. If module that runs ExLibnice is a GenServer we can use
# handle_info/2 callback
@impl true
def handle_info({:new_candidate_full, candidate}, {peer_socket: peer_socket} = state) do
:socket.send(peer_socket, {:peer_new_candidate_full, candidate})
end
```
```elixir
# Set received peer candidates.
:ok = ExLibnice.set_remote_candidate(ice, peer_candidate, stream_id, 1)
```
This will start connectivity checks. Receiving message
`{:component_state_ready, stream_id, component_id}` indicates that the given component in the given
stream is ready to send and receive messages.
For more complete examples please refer to
[membrane_ice_plugin](https://github.com/membraneframework/membrane_ice_plugin) where we use
`ex_libnice` or our integration test.
## Copyright and License
Copyright 2020, [Software Mansion](https://swmansion.com/?utm_source=git&utm_medium=readme&utm_campaign=membrane_ice)
[](https://swmansion.com/?utm_source=git&utm_medium=readme&utm_campaign=membrane_ice)
Licensed under the [Apache License, Version 2.0](LICENSE)
[libnice]: https://libnice.freedesktop.org/