1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
This file is part of keks-meet (https://codeberg.org/metamuffin/keks-meet)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2022 metamuffin <metamuffin@disroot.org>
*/
use crate::{
protocol::{self, RelayMessage, Sdp},
state::State,
};
use log::info;
use std::sync::Arc;
use tokio::sync::mpsc::UnboundedSender;
use webrtc::{
ice_transport::{ice_candidate::RTCIceCandidate, ice_server::RTCIceServer},
peer_connection::{
configuration::RTCConfiguration, peer_connection_state::RTCPeerConnectionState,
sdp::session_description::RTCSessionDescription, RTCPeerConnection,
},
};
pub struct Peer {
pub signal: UnboundedSender<(usize, RelayMessage)>,
pub peer_connection: RTCPeerConnection,
pub id: usize,
}
impl Peer {
pub async fn create(
state: Arc<State>,
signal: UnboundedSender<(usize, RelayMessage)>,
id: usize,
) -> Arc<Self> {
info!("({id}) peer joined");
let config = RTCConfiguration {
ice_servers: vec![RTCIceServer {
urls: vec!["stun:metamuffin.org:16900".to_owned()],
..Default::default()
}],
..Default::default()
};
let peer_connection = state.api.new_peer_connection(config).await.unwrap();
let peer = Arc::new(Self {
signal,
peer_connection,
id,
});
peer.peer_connection
.on_peer_connection_state_change(Box::new(move |s: RTCPeerConnectionState| {
info!("connection state changed: {s}");
Box::pin(async {})
}))
.await;
{
let weak = Arc::<Peer>::downgrade(&peer);
peer.peer_connection
.on_ice_candidate(box move |c| {
let peer = weak.upgrade().unwrap();
Box::pin(async move {
if let Some(c) = c {
peer.on_ice_candidate(c).await
}
})
})
.await;
}
{
let weak = Arc::<Peer>::downgrade(&peer);
peer.peer_connection
.on_negotiation_needed(box move || {
let peer = weak.upgrade().unwrap();
Box::pin(async { peer.on_negotiation_needed().await })
})
.await;
}
{
peer.peer_connection
.on_data_channel(box move |dc| {
Box::pin(async move {
dc.on_message(box move |message| {
Box::pin(async move { println!("{:?}", message.data) })
})
.await
})
})
.await;
}
peer
}
pub async fn send_relay(&self, inner: RelayMessage) {
self.signal.send((self.id, inner)).unwrap()
}
pub async fn on_relay(&self, p: RelayMessage) {
match p {
protocol::RelayMessage::Offer(o) => self.on_offer(o).await,
protocol::RelayMessage::Answer(a) => self.on_answer(a).await,
protocol::RelayMessage::IceCandidate(c) => {
info!("received ICE candidate");
self.peer_connection.add_ice_candidate(c).await.unwrap();
}
_ => (),
}
}
pub async fn on_ice_candidate(&self, candidate: RTCIceCandidate) {
self.send_relay(RelayMessage::IceCandidate(
candidate.to_json().await.unwrap(),
))
.await;
}
pub async fn on_negotiation_needed(self: Arc<Self>) {
info!("({}) negotiation needed", self.id);
self.offer().await
}
pub async fn offer(&self) {
info!("({}) sending offer", self.id);
let offer = self.peer_connection.create_offer(None).await.unwrap();
self.peer_connection
.set_local_description(offer.clone())
.await
.unwrap();
self.send_relay(protocol::RelayMessage::Offer(offer.sdp))
.await
}
pub async fn on_offer(&self, offer: Sdp) {
info!("({}) received offer", self.id);
let offer = RTCSessionDescription::offer(offer).unwrap();
self.peer_connection
.set_remote_description(offer)
.await
.unwrap();
self.answer().await
}
pub async fn answer(&self) {
info!("({}) sending answer", self.id);
let offer = self.peer_connection.create_answer(None).await.unwrap();
self.peer_connection
.set_local_description(offer.clone())
.await
.unwrap();
self.send_relay(protocol::RelayMessage::Answer(offer.sdp))
.await
}
pub async fn on_answer(&self, answer: Sdp) {
info!("({}) received answer", self.id);
let offer = RTCSessionDescription::answer(answer).unwrap();
self.peer_connection
.set_remote_description(offer)
.await
.unwrap();
}
}
|
