libp2p_webrtc_utils/stream/
framed_dc.rs

1// Copyright 2022 Parity Technologies (UK) Ltd.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the "Software"),
5// to deal in the Software without restriction, including without limitation
6// the rights to use, copy, modify, merge, publish, distribute, sublicense,
7// and/or sell copies of the Software, and to permit persons to whom the
8// Software is furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
19// DEALINGS IN THE SOFTWARE.
20
21use asynchronous_codec::Framed;
22use futures::{AsyncRead, AsyncWrite};
23
24use crate::{
25    proto::Message,
26    stream::{MAX_DATA_LEN, MAX_MSG_LEN, VARINT_LEN},
27};
28
29pub(crate) type FramedDc<T> = Framed<T, quick_protobuf_codec::Codec<Message>>;
30pub(crate) fn new<T>(inner: T) -> FramedDc<T>
31where
32    T: AsyncRead + AsyncWrite,
33{
34    let mut framed = Framed::new(inner, codec());
35    // If not set, `Framed` buffers up to 131kB of data before sending, which leads to "outbound
36    // packet larger than maximum message size" error in webrtc-rs.
37    framed.set_send_high_water_mark(MAX_DATA_LEN);
38    framed
39}
40
41pub(crate) fn codec() -> quick_protobuf_codec::Codec<Message, Message> {
42    quick_protobuf_codec::Codec::new(MAX_MSG_LEN - VARINT_LEN)
43}
libp2p_webrtc_utils/stream/framed_dc.rs

libp2p_webrtc_utils/stream/
framed_dc.rs
