Crate rtc_datachannel 

WebRTC data channels over SCTP.

The Data Channel Establishment Protocol (RFC 8832) and the SCTP-based data channel layer (RFC 8831): the DATA_CHANNEL_OPEN handshake, the reliability and ordering parameters, and the payload protocol identifiers that distinguish string from binary messages.

Structure

• data_channel — one channel’s state and its read/write surface over an SCTP stream, including partial-reliability settings (maxPacketLifeTime, maxRetransmits).
• message — the DCEP messages themselves: DataChannelOpen, DataChannelAck, and the channel-type encoding.

Example

use bytes::Bytes;
use rtc_datachannel::message::message_channel_open::{ChannelType, DataChannelOpen};
use rtc_datachannel::message::{Message, message_type::MessageType};
use shared::marshal::{Marshal, Unmarshal};

let open = Message::DataChannelOpen(DataChannelOpen {
    channel_type: ChannelType::PartialReliableRexmit,
    priority: 256,
    reliability_parameter: 3, // give up after 3 retransmissions
    label: b"chat".to_vec(),
    protocol: Vec::new(),
});
assert_eq!(open.message_type(), MessageType::DataChannelOpen);

let encoded = open.marshal()?;
let mut buf = Bytes::from(encoded.to_vec());
assert_eq!(Message::unmarshal(&mut buf)?, open);

Most applications do not depend on this crate directly — the rtc crate layers it over rtc-sctp and exposes RTCDataChannel.

Modules

data_channel

One data channel’s state and its read/write surface over an SCTP stream. One data channel over an SCTP stream.

message

The DCEP messages exchanged to open, acknowledge and close a channel.