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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
//! Module to handle the various possible ClientIds
use core::fmt::{Display, Formatter};
use core::net::SocketAddr;
use lightyear_serde::reader::{ReadInteger, Reader};
use lightyear_serde::writer::WriteInteger;
use lightyear_serde::{SerializationError, ToBytes};
use serde::{Deserialize, Serialize};
use bevy_derive::Deref;
use bevy_ecs::component::Component;
use bevy_reflect::Reflect;
/// Stores the PeerId of the local peer for the connection
#[derive(
Debug, Component, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, Reflect, Deref,
)]
pub struct LocalId(pub PeerId);
impl Display for LocalId {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
core::fmt::Debug::fmt(&self.0, f)
}
}
/// Stores the PeerId of the remote peer that we are connected to
#[derive(
Debug, Component, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, Reflect, Deref,
)]
pub struct RemoteId(pub PeerId);
impl Display for RemoteId {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
core::fmt::Debug::fmt(&self.0, f)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, Reflect)]
pub enum PeerId {
Entity(u64),
/// A raw connection where the IO Link is used to associate a long-term id.
/// The id is the SocketAddr of the link.
#[reflect(ignore)]
Raw(SocketAddr),
/// A client id that is unique between netcode connections
Netcode(u64),
/// The client id of a steam user
Steam(u64),
/// A local client to use when running in HostServer mode
Local(u64),
/// Refers to the server
Server,
}
impl ToBytes for PeerId {
fn bytes_len(&self) -> usize {
match self {
PeerId::Entity(_) => 1 + 8,
PeerId::Raw(socket_addr) => {
// 1 byte for variant + address bytes + 2 bytes for port
match socket_addr {
SocketAddr::V4(_) => 1 + 4 + 2,
SocketAddr::V6(_) => 1 + 16 + 2,
}
}
PeerId::Netcode(_) => 1 + 8,
PeerId::Steam(_) => 1 + 8,
PeerId::Local(_) => 1 + 8,
PeerId::Server => 1,
}
}
fn to_bytes(&self, buffer: &mut impl WriteInteger) -> Result<(), SerializationError> {
match self {
PeerId::Entity(id) => {
buffer.write_u8(0)?;
buffer.write_u64(*id)?;
}
PeerId::Raw(socket) => {
match socket {
SocketAddr::V4(v4) => {
buffer.write_u8(1)?;
// Write IPv4 bytes
for byte in v4.ip().octets().iter() {
buffer.write_u8(*byte)?;
}
// Write port
buffer.write_u16(v4.port())?;
}
SocketAddr::V6(v6) => {
buffer.write_u8(2)?;
// Write IPv6 bytes
for segment in v6.ip().segments().iter() {
buffer.write_u16(*segment)?;
}
// Write port
buffer.write_u16(v6.port())?;
}
}
}
PeerId::Netcode(id) => {
buffer.write_u8(3)?;
buffer.write_u64(*id)?;
}
PeerId::Steam(id) => {
buffer.write_u8(4)?;
buffer.write_u64(*id)?;
}
PeerId::Local(id) => {
buffer.write_u8(5)?;
buffer.write_u64(*id)?;
}
PeerId::Server => {
buffer.write_u8(6)?;
}
}
Ok(())
}
fn from_bytes(buffer: &mut Reader) -> Result<Self, SerializationError>
where
Self: Sized,
{
match buffer.read_u8()? {
0 => Ok(PeerId::Entity(buffer.read_u64()?)),
1 => {
// Read IPv4 address
let a = buffer.read_u8()?;
let b = buffer.read_u8()?;
let c = buffer.read_u8()?;
let d = buffer.read_u8()?;
let port = buffer.read_u16()?;
let addr = SocketAddr::new(
core::net::IpAddr::V4(core::net::Ipv4Addr::new(a, b, c, d)),
port,
);
Ok(PeerId::Raw(addr))
}
2 => {
// Read IPv6 address
let mut segments = [0u16; 8];
for segment in &mut segments {
*segment = buffer.read_u16()?;
}
let port = buffer.read_u16()?;
let addr = SocketAddr::new(
core::net::IpAddr::V6(core::net::Ipv6Addr::from(segments)),
port,
);
Ok(PeerId::Raw(addr))
}
3 => Ok(PeerId::Netcode(buffer.read_u64()?)),
4 => Ok(PeerId::Steam(buffer.read_u64()?)),
5 => Ok(PeerId::Local(buffer.read_u64()?)),
6 => Ok(PeerId::Server),
_ => Err(SerializationError::InvalidValue),
}
}
}
impl PeerId {
// TODO: add impl From<ClientId> for u64?
/// Convert a ClientId to a u64 representation
pub fn to_bits(&self) -> u64 {
match self {
PeerId::Entity(x) => *x,
PeerId::Raw(socket) => {
// Create a simple hash for the IP address
// Just for differentiation - not meant to be a secure hash
match socket {
SocketAddr::V4(v4) => {
let octets = v4.ip().octets();
let mut result: u64 = 0x0200; // Prefix for IPv4
result |= (octets[0] as u64) << 24;
result |= (octets[1] as u64) << 16;
result |= (octets[2] as u64) << 8;
result |= octets[3] as u64;
result |= (v4.port() as u64) << 32;
result
}
SocketAddr::V6(v6) => {
// Simple hash for IPv6 - fold the segments
let segments = v6.ip().segments();
let mut hash: u64 = 0x0600; // Prefix for IPv6
for (i, &segment) in segments.iter().enumerate() {
hash ^= (segment as u64) << ((i % 4) * 16);
}
hash ^= (v6.port() as u64) << 48;
hash
}
}
}
PeerId::Netcode(x) => *x,
PeerId::Steam(x) => *x,
PeerId::Local(x) => *x,
PeerId::Server => 1,
}
}
pub fn is_local(&self) -> bool {
matches!(self, PeerId::Local(_))
}
}
impl core::fmt::Display for PeerId {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
core::fmt::Debug::fmt(self, f)
// match self {
// ClientId::Netcode(id) => write!(f, "NetcodeClientId({})", id),
// ClientId::Steam(id) => write!(f, "SteamClientId({})", id),
// ClientId::LocalClient => write!(f, "LocalClientId"),
// }
}
}