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
use {NetworkProtocolHandler, NetworkConfiguration, NonReservedPeerMode};
use error::NetworkError;
use host::{Host, NetworkContext, NetworkIoMessage, PeerId, ProtocolId};
use stats::NetworkStats;
use io::*;
use parking_lot::RwLock;
use std::sync::Arc;
use ansi_term::Colour;
struct HostHandler {
public_url: RwLock<Option<String>>
}
impl IoHandler<NetworkIoMessage> for HostHandler {
fn message(&self, _io: &IoContext<NetworkIoMessage>, message: &NetworkIoMessage) {
if let NetworkIoMessage::NetworkStarted(ref public_url) = *message {
let mut url = self.public_url.write();
if url.as_ref().map_or(true, |uref| uref != public_url) {
info!(target: "network", "Public node URL: {}", Colour::White.bold().paint(public_url.as_ref()));
}
*url = Some(public_url.to_owned());
}
}
}
pub struct NetworkService {
io_service: IoService<NetworkIoMessage>,
host_info: String,
host: RwLock<Option<Arc<Host>>>,
stats: Arc<NetworkStats>,
panic_handler: Arc<PanicHandler>,
host_handler: Arc<HostHandler>,
config: NetworkConfiguration,
}
impl NetworkService {
pub fn new(config: NetworkConfiguration) -> Result<NetworkService, NetworkError> {
let host_handler = Arc::new(HostHandler { public_url: RwLock::new(None) });
let panic_handler = PanicHandler::new_in_arc();
let io_service = IoService::<NetworkIoMessage>::start()?;
panic_handler.forward_from(&io_service);
let stats = Arc::new(NetworkStats::new());
let host_info = Host::client_version();
Ok(NetworkService {
io_service: io_service,
host_info: host_info,
stats: stats,
panic_handler: panic_handler,
host: RwLock::new(None),
config: config,
host_handler: host_handler,
})
}
pub fn register_protocol(&self, handler: Arc<NetworkProtocolHandler + Send + Sync>, protocol: ProtocolId, packet_count: u8, versions: &[u8]) -> Result<(), NetworkError> {
self.io_service.send_message(NetworkIoMessage::AddHandler {
handler: handler,
protocol: protocol,
versions: versions.to_vec(),
packet_count: packet_count,
})?;
Ok(())
}
pub fn host_info(&self) -> String {
self.host_info.clone()
}
pub fn io(&self) -> &IoService<NetworkIoMessage> {
&self.io_service
}
pub fn stats(&self) -> &NetworkStats {
&self.stats
}
pub fn config(&self) -> &NetworkConfiguration {
&self.config
}
pub fn external_url(&self) -> Option<String> {
let host = self.host.read();
host.as_ref().and_then(|h| h.external_url())
}
pub fn local_url(&self) -> Option<String> {
let host = self.host.read();
host.as_ref().map(|h| h.local_url())
}
pub fn start(&self) -> Result<(), NetworkError> {
let mut host = self.host.write();
if host.is_none() {
let h = Arc::new(Host::new(self.config.clone(), self.stats.clone())?);
self.io_service.register_handler(h.clone())?;
*host = Some(h);
}
if self.host_handler.public_url.read().is_none() {
self.io_service.register_handler(self.host_handler.clone())?;
}
Ok(())
}
pub fn stop(&self) -> Result<(), NetworkError> {
let mut host = self.host.write();
if let Some(ref host) = *host {
let io = IoContext::new(self.io_service.channel(), 0);
host.stop(&io)?;
}
*host = None;
Ok(())
}
pub fn connected_peers(&self) -> Vec<PeerId> {
self.host.read().as_ref().map(|h| h.connected_peers()).unwrap_or_else(Vec::new)
}
pub fn add_reserved_peer(&self, peer: &str) -> Result<(), NetworkError> {
let host = self.host.read();
if let Some(ref host) = *host {
host.add_reserved_node(peer)
} else {
Ok(())
}
}
pub fn remove_reserved_peer(&self, peer: &str) -> Result<(), NetworkError> {
let host = self.host.read();
if let Some(ref host) = *host {
host.remove_reserved_node(peer)
} else {
Ok(())
}
}
pub fn set_non_reserved_mode(&self, mode: NonReservedPeerMode) {
let host = self.host.read();
if let Some(ref host) = *host {
let io_ctxt = IoContext::new(self.io_service.channel(), 0);
host.set_non_reserved_mode(mode, &io_ctxt);
}
}
pub fn with_context<F>(&self, protocol: ProtocolId, action: F) where F: Fn(&NetworkContext) {
let io = IoContext::new(self.io_service.channel(), 0);
let host = self.host.read();
if let Some(ref host) = host.as_ref() {
host.with_context(protocol, &io, action);
};
}
pub fn with_context_eval<F, T>(&self, protocol: ProtocolId, action: F) -> Option<T> where F: Fn(&NetworkContext) -> T {
let io = IoContext::new(self.io_service.channel(), 0);
let host = self.host.read();
host.as_ref().map(|ref host| host.with_context_eval(protocol, &io, action))
}
}
impl MayPanic for NetworkService {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}